SARVAYOGAM SCHOOL
Standard : 10 : SCIENCE Lesson - 1
Q.1 Choose the correct. [Marks : 50]
(1) Each 'C' atoms can covalently bonded with how many other atoms ?
(a) Two
(b) Four
(c) One
(d) Three
(2) Because of which phenomena nano materials has the property of sticking and
(a) Nano materials have high freezing point.
friction ?
(b) Nanomaterials are sticky
(c) Nano materials have smaller surface area as
compared to their volume.
(d) Nano materials have larger surface area as
compared to their volume.
(3) Which one of the following is not associated with the invention of bucky
(a) Sumio Tijima
(b) Harold Krato
ball ?
(c) Richard Smalley
(d) Robert Kurl
(4) MWNT means ___
(a) Carbon nanotube having single cylinder.
(c) Cylindrical shape of bucky ball.
(b) Carbon nanotube having multiple cylinders.
(d) Carbon nanotube having multiple concentric varying diameters.
(5) Who first proposed the term nanotechnology ?
(a) Richard Feynman
(b) Heinrich Rohrer
(c) Eric Drexler
(d) Sumio Tijima
(6) What is the maximum limit of human eye to see ?
(a) 1000 nm
(b) 2000 nm
(c) 10000 nm
(d) 5000 nm
(c) 2 nm
(d) 1 nm
(7) What is the diameter of arbon nanotube ?
(a) 1.3 nm
(b) 0.1 nm
(8) What is the wavelength of visible light ?
(a) 100 nm - 400 nm
(b) 100 nm - 200 nm
(c) 400 nm - 700 nm
(d) 200 nm - 800 nm
(c) Atomic Engineering
(d) Mechanical
(9) Which science is used to rearrange the atoms ?
(a) Physics
(b) Material Science
engineering
(10) What is the shape of an atom of carbon nanotube ?
(a) Spherical
(b) Cylindrical
(c) Tetrahedral
(d) 3-Dimensional Lattice
(11) What are the dimensions of the substances studied in Nanoscience ?
(a) 100 nm - 200 nm
(b) 200 nm - 500 nm
(c) 300 nm - 500 nm
(d) 1 nm - 100 nm
(12) Which is the most important property of nanomaterial ?
(a) Force
(b) Friction
(13) What is the dimension of quantum dot ?
(c) Temperature
(d) Pressure
(a) 3 nm
(b) 2 nm
(c) 1 nm
(d) 5 nm
(14) What is the measure of spacing between the silicon atoms ?
(a) Micrometer
(b) –Angstrom
(c) Nanometer
(d) Millimeter
(15) Which of the following can help in acquiring the knowledge of Nanoscience ?
(a) Robotics
(b) IT
(c) Laswer technology
(16) Which form does the carbon atom result in when they are bonded together in
(a) Plasma
(b) Gas
(d) Nanotechnology
long chains ?
(c) Solid
(d) Liquid
(17) What is the width of DNA ?
(a) 90 nm
(b) 2 nm
(c) 50 nm
(d) 1 nm
(18) How much diameter of a nanoshell can be used in the diagnosis of cancer ?
(a) 10 nm
(b) 100 nm
(c) 1000 nm
(d) 1 nm
(19) What is the reason behind the high tensile strength of carbon nanotube ?
(a) Due to carbon-carbon bonds
(b) Low freezing point of carbon
(c) Vibrations of carbon bonds
(d) Long chain of carbons
(20) Which of the following is not a field of nanoscience ?
(a) Nanotube
(b) Nano composite
(c) Nano fabrications
(d) Bucky ball
(b) 50 nm
(c) 2 nm
(d) 10000 nm
(b) 90 nm
(c) 1 nm
(d) 50 nm
(21) What is the size of E-coli bacteria ?
(a) 2000 nm
(22) What is the size of virus ?
(a) 2 nm
(23) The size of flyash and red cells of blood are measured in ___
(a) Micrometer
(b) Millimeter
(c) Centimeter
(d) Nanometer
(24) What is the size of integrated circuit transistor ?
(a) 90 nm
(b) 1 nm
(c) 50 nm
(d) 2000 nm
(25) What is the reason behind the high conductivity of carbon nanotubes ?
(a) Due to carbon-carbon bonds
(b) Long chain of carbons
(c) High freezing point of carbon
(d) Vibrations of carbon bonds
(26) Who photographed carbon nanotube ?
(a) Harold Krato
(b) Robert Kurl
(c) Sumio Tijima
(d) Richard Smalley
(c) 0.1 nm
(d) 1.3 nm
(27) What is the diameter of hydrogen atom ?
(a) 50 nm
(b) 2 nm
(28) SWNT has ___
(a) Carbon nanotube with single cylinder.
(b) Cylindrical shape of bucky ball.
(c) Carbon nanotube with multiple cylinders (d) Carbon nanotube with multiple concentric varying diameters.
(29) What is the diameter of a bucky ball ?
(a) 2 nm
(b) 1.3 nm
(c) 0.1 nm
(d) 1 nm
(30) Which is the extended form of bucky ball ?
(a) Carbon Nanotube
(b) Plastic
(c) Fullerene
(d) Diamond
(31) Which constituents will transformed electricity into light, preventing excess loss of energy due to heating ?
(a) Nano crystals
(b) Quantum Dot
(c) Nanotube
(d) Bucky ball
(32) Which scientist gave the concept of Nanoscience and Nanotechnology ?
(a) Richard Smalley
(b) Gerd Binning
(c) Richard Feynman
(d) Eric Drexler
(c) Like a chain
(d) A Tetrahedron
(33) What is the shape of bucky ball ?
(a) A Three-Dimensional Lattice
(b) A Football
(34) In a bucky ball, each carbon atom is bonded with how many other carbon
(a) Two
(b) Three
(c) Four
atoms ?
(d) One
(35) Who invented carbon nanotube ?
(a) Harold Krato
(b) Richard Smalley
(c) Robert Kurl
(36) Due to which property of nanparticle, development in printing field would
(a) Ability to absorb colours
(b) Property of sticking
(d) Sumio Tijima
take place ?
(c) Friction
(d) Temperature
(37) Which geometrical shapes are observed in the construction of bucky ball ?
(a) Rhombus
(b) Triangle
(c) Pentagon and Hexagon
(d) Pentagon
(38) With the help of which instrument, atoms can be newly arranged ?
(a) Electron Microscope (b) Compound Microscope (c) Simple Microscope (d) Scanning Tunneling Microscope
(39) Which special property does the nano aluminium possess ?
(a) Chemically more reactive
(b) Low freezing point
(c) High tensile strength
(d) High Thermal conductivity
(40) Which form does the carbon atom result in when they are bonded together in short chains ?
(a) Solid
(b) Gas
(c) Plasma
(41) How many carbon atoms are present in architectural configuration of bucky
(a) 40
(b) 60
(c) 30
(d) Liquid
ball ?
(d) 50
(42) What is the diameter of human hair ?
(a) 2000 nm
(b) 10000 nm
(c) 500 nm
(d) 75000 nm
(43) 1 metre = _______ nanometer
a)10-9
b) 10-6
c) 109
d) 106
44. 10 namometre = ______ metre
a) 10-8
b) 10-7
c) 10-9
d) 10-10
45. What is full form of CRN?
a) Central responsible nanotechnology
b) centre for reasonable nanotechnology
c) centre for responsible nano science
d) Centre for responsible nanotechnology
46. Size of nanoparticles range between ______ nm
a) 100 to 1000
b) 0.1 to 10
c) 1 to 100
d) 0.01 to 1
47. Scientists and technocrats expect fully matured nanotechnology to be functioning by the year _________
a) 2015
b) 2020
c) 2025
d) 2030
48. What is full form of STM?
a) single tube microscope
b)scanning telescopic microscope
c) screening testing microscope
d) scanning tunneling microscope
49. Buckballs with different numbers of C- atoms are reported with smallest cluster of ______ to largest ______
a) C20 C450
b) C20 C70
c) C60 C540
d) C20 C540
c) 6.3 X 109
d) 0.63 X 109
c) 25 X 10-9
d) 2.5 X 10-9
50. The tensile strength of MWNT is ____ Pa.
a) 6.3 X 1010
b) 63 X 1010
51. The hardness of standard SWNT is about ________Pa.
a) 2.5 X 109
b) 25 X 109
52. Metallic nanotubes van carry electric current of ___________ ampere per 1 cm2 cross section of the tube.
a) 109
b) 10-9
c) 10
d) 9
53. MWNT shows superconductivity up to the temperature _______
a) 12 K
b) 12 0C
c) 20 K
54. Thermal conductivity of standard SWNT along its length is __________
a) 3500
b) 385
55. The thermal conductivity of copper is ______
a) 3500
b) 385
d) 21 K
𝑊
𝑚𝐾
c) 35,000
d) 35
c) 35,000
d) 35
𝑊
𝑚𝐾
SARVAYOGAM SCHOOL
Standard : 10 : SCIENCE Chapter – 2
Q.1 Choose the correct. [Marks : 50]
(1) The object is placed ___, if the image formed by concave mirror is real and inverted.
(a) The image moves to the focus and gradually become small.
(b) The image moves to the pole and gradually become small.
(c) The image moves to the focus and gradually become large.
(d) The image moves to the pole and gradually become large.
(2) What will be the nature of image if the object is placed at any distance except infinity in front of convex mirror
(a) Virtual and inverted
(b) Real and inverted
(c) Real and erect
(d) Virtual and erect
(3) Where is the object placed, if the image formed by concave mirror is erect and virtual ?
(a) Between pole and centre of curvature
(b) Before C
(c) Between principal focus and centre of curvature
(d) On the centre of curvature
(4) The absolute refractive index of any medium is greater than 1 because ___
(a) The velocity of light in vacuum is equal to the velocity of light in the medium
(b) None of these
(c) The velocity of light in vacuum is always less than the velocity of light in medium
(d) The velocity of light in vacuum is always greater
than the velocity of light in medium
(5) Which of the following statements is not true for he real image ?
(a) It can be obtained on the screen
(b) It is always inverted
(c) Th liht rays really meet together
(d) It is always erect
(6) the reciprocal of the focal length is called the ___
(a) None of these
(b) Power of Jens
(c) Radius of curvature of the lens
(d) Lateral shift
(7) Darkness is the ___ of light.
(a) Total scattering
(b) Total reflection
(c) Total refraction
(d) Total absorption
(8) Centre of lens on principal axis is called ____
(a) Optical centre
(b) None of these
(c) Centre of curvature
(d) Principal axis
(9) The centre of surface of mirror is called as ___
(a) Aperture
(b) Pole
(c) Principal focus
(d) Centre of curvature
(10) What can be called for the ray passing through the principal focus of concave mirror after reflection ?
(a) They will passes through centre of curvature
(c) They will passes through pole P
(b) They will be parallel to principal axis
(d) None of these
(11) The distance between the optical centre and the principal focus is called ___
(a) None of these
(b) Principal axis
(c) Focal length
(d) Radius of curvature
(12) 'A light wave can be taken to travel from one point to another in straight line path joining them'. - What is this
straight line path ?
(a) Path of light
(b) Ray
(c) Beam
(d) Axis
(13) Ratio of ___ is called magnification.
(a) height of image to object distance
(b) height of object to image distance
(c) height of object to height of image
(d) height of image to height of object
(14) The angle that incident ray makes with normal is called as ___
(a) Angle of incidence
(b) Angle of emergence
(c) Angle of reflection
(15) Magnification of plane mirror is ____
(a) always greater than 1
(b) less than 1
(c) 1
(d) 0
(d) Angle of deviation
(16) Which electromagnetic radiation produces sensation in our eyes ?
(a) Light
(b) Ultraviolet wave
(c) Infrared wave
(d) Gamma rays
(17) The SI unit of power of lens is ___
(a) centimetre
(b) diopter
(c) metre
(d) metre/second
(18) When the rays of light travels from optically denser medium to the optically rarer medium than this ray will _
(a) bends aways from normal
(b) absorbed
(c) bends towards normal
(d) not bends
(19) The image formed by plan mirror is ___
(a) Laterally inverted
(b) Virtual and inverted
(c) Real and inverted
(d) Real and erect
(20) Where will the image be formed if the object is placed in front of concave mirror and beyond C ?
(a) Between centre of curvature
(b) On the centre of curvature C
(c) Beyond C (d) On principal focus F
(21) If the image is virtual and erect, then magnification would be ____
(a) Positive
(b) Zero
(c) Negative
(d) None of these
(22) When a ray of light goes from one medium to another its ___ remains constant.
(a) velocity
(b) frequency
(c) refractive index
(d) wavelength
(23) The angle of incidence for which angle of refraction is 90 is known as ___
(a) Angle of emergence
(b) Citical angle
(c) Angle of deviation
(d) Angle of refraction
(24) If the inner surface of circular cross section of spherical shell is made reflected ___ is formed.
(a) plane mirror
(b) concave mirror
(c) glass slab
(d) convex mirror
(25) The rays parallel to the principal axis after reflection passes through the ___
(a) None of these
(b) Centre of curvature
(c) Pole
(d) Principal focus
(26) In which phenomenon the total internal reflection does not occurs ?
(a) Brilliancy of diamond
(b) Mirage
(c) Twinkling of stars
(d) Rainbow
(27) Power of convex lens is ___
(a) positive
(b) positive or negative
(c) negative
(d) zero
(28) Curved mirror is a part of spherical shell, then centre of spherical shell is called ___
(a) Principal focus
(b) Centre of courvature
(c) Aperture
(d) Pole
(29) Which mirror has infinite focal length ?
(a) Concave
(b) Convex
(c) Plane
(d) Spherical
(30) In which condition the refraction of light does not occurs ?
(a) When the angle of refrction is greater than angle
(b) When the angle of incidence equal to the anle of
(c) None of these
of incidence
refraction
(d) When the angle of incidence is greater than angle of refraction
(31) The centre of the sphere of which the surface of glass from a part is called ___
(a) CEntre of curvature
(b) Principal focus
(c) Pole
(d) Optical centre
(32) Which instrument is used to measure the power of lens ?
(a) pH metre
(b) Compound microscope
(c) AFM
(d) Dioptre metre
(33) Which of the following statement is not true for the virtual image ?
(a) It's rays appear to meet
(c) It is always erect
(b) It can not be obtained on the screen
(d) It is always inverted
(34) The incident angle and reflected angle are on ___ of the normal drawn to the surface.
(a) Same side
(c) None of these
(b) Opposite side in the same medium
(d) Opposite side in different medium
(35) Magnification is 1 for which mirror ?
(a) None of these
(b) Plane mirror
(c) Convex mirror
(d) Concave mirror
(36) The point where the rays parallel to the principal axis of concave mirror after reflection is called ___
(a) Aperture
(b) Pole
(c) Radius of curvature
(d) Principal focus
(37) Which of the following is not true according to the Cartesian sign
convention for reflection by spherical mirror ?
(a) The distance measured in the direction of
incident ray are taken positive
(b) All distance are measured from pole on principal
axis
(c) The height measured upwards are taken positive
(d) Height is incident from the right side of mirror
(38) Which of the following statement is not true in case of light wave ?
(a) They are nonmechanical waves.
(b) They are transverse waves
(c) They are nonmechanical as well as transverse
waves.
(d) They are electromagnetic wave.
(39) In which mirror, the image formed of the objet is inverted ?
(a) Concave
(b) Convex
(c) None of these
(d) Plane
(40) What is the distance between pole and principal focus of a mirror is called ?
(a) Radius of curvature
(b) Focal Length
(c) Aperture
(d) Pole
(41) At which point of lens the incident rays parallel to the principal axis does under go refraction ?
(a) Parallel to the principal axis
(b) Optical centre
(c) Principal focus
(d) None of these
(42) The angle that reflected ray makes with normal is called as ___
(a) Angle of Deviation
(b) Angle of emergence
(c) Angle of reflection
(d) Angle of incidence
(43) The lateral shift depends on ___ two refracting surfaces.
(a) none of these
(b) Perpendicular distance between
(c) distance
(d) type of
(44) The unit of refractive index is ___
(a) metresecond
(b) dioptre
(c) metre
(d) unitless
(45) If dioptre of lens is doubled, what will be its power ?
(a) One
(b) Double
(c) Half
(d) Constant
(46) Where should the object the placed to obtain same size of image and object
(a) Beyond 2F
(b) Between F and 2F
(c) Between F and O
?
(d) On 2F
(47) The power of a convex lens of focal length 20 cm is ___
(a) 0.05
(b) 50
(c) 5
(d) 0.5
(48) Which type of mirror is used to view the traffic of rear side of vehicle ?
(a) convex
(b) plane
(c) concave
(d) concave-convex
(49) Which optical phenomenon is responsible for mirage ?
(a) Only refraction
(b) Refraction and internal reflection
(c) Only total internal reflection (d) Reflection
(50) A straight line passing through the centre of curvature of lens is called
(a) Focal length
(b) None of these
(c) Principal aixs
___
(d) Radius of curvature
(51) Which of the following has highest refractive index ?
(a) Glass
(b) Diamond
(c) Pearl
(d) Water
(52) Where will the image be formed if the object is placed at the principal focus F in front of concave mirror ?
(a) On C
(b) Beyond center of curvature C
(c) On F
(d) At infinity
(53) What will be the size and nature of image, if the object is placed at the
centre of curvature C in front of concave mirror ?
(a) Real and diminished
(b) Real and same size
(c) Virtual and enlarged
(54) Where should the object be placed, if the image formed by convex lens is
(d) Real and enlarged
virtual, erect and magnified ?
(a) At infinite distance
(b) Beyond 2F
(c) Between F and 2F
(d) On 2F
(55) A pencil emerged in glass of is seen bend, which of the phenomena of light is responsbile for this ?
(a) reflection
(b) Refraction
(c) Diffraction
(d) Interference
(56) Incident rays and refracted rays are always ____
(a) In same plane and different medium.
(b) In same plane and same medium.
(c) In different plane and different medium.
(d) In different plane and same medium.
(57) If the outer surface of circular cross-section of spherical shell is made reflected ___ is formed.
(a) plane mirror
(b) concave mirror
(c) glass slab
(d) convex mirror
(58) When the object placed on the axis of a lens at infinity, where the image is formed ?
(a) Principal focus (b) On pole (c) One the centre of curvature (d) Between principal focus and optical centre
(59) What is the imaginary line passing through the pole and centre of
(a) Radius of curvature
(b) Focal length
(c) Aperture
curvature called ?
(d) Principal axis
(60) Incident ray and reflected ray are always ___
(a) On different plane and in different medium
(c) On different plane and in same medium
(b) On same plane and in same medium
(d) On same plane and in different medium
(61) If focal length of spherical mirror is 40 cm then its radius of curvature is ___
(a) 10 cm
(b) 20 cm
(c) 80 cm
(d) None of these
(62) Power of a concave lens is -2.0D, its focal length is ___
(a) 0.50 m
(b) 50 cm
(c) 50 m
(d) -0.50 m
(63) Which is the phenomenon when light is incident on the surface of object and is reflected back ?
(a) Refraction
(b) Dispersion
(c) Reflection
(d) Absorption
(64) By which the phenomenon of light, we can see the object around us ?
(a) Irregular reflection
(b) Reflection
(c) Refraction
(d) Regular reflection
(65) By which of the following options can be the image formed by an object be decided ?
(a) A ray which passes through the principal focus of
axis after reflection.
concave mirror and become parallel to the principal
(b) None of these
(c) A ray which passes through the centre of
the mirror after reflection.
curvature of concave mirror and becomes perpendicur to
(d) A ray which is parallel to principal axis of a
concave mirror and passes
through principal focus after reflection.
(66) Power of concave lens is ____
(a) positive
(b) zero
(c) negative
(d) infinite
(67) What happens for a refractive index when we move form lower earth's
atmosphere to heighr earth's atmosphere ?
(a) Refractive index decreasing
(b) None of these
(c) Refractive index remains constant
(d) Refractive index increasing
(68) A boy is standing at a distance of 2 m in front of plane mirror, than what
is the distance between boy and his image ?
(a) 2 metre
(b) 3 metre
(c) 4 metre
(d) 1 metre
(69) Which type of mirror always form a erect image if the objected placed at any distance from this mirror ?
(a) Concave or Convex
(b) Concave
(c) Convex
(d) none of these
(70) Which is not tre in the case of the image formed by the plane mirror ?
(a) Image is always erect and virtual
(b) Image is always inverted
(c) Distance between object and distance between image is equal
(d) Height of object is greater than height of image
(71) For which os following the rays of light are focus ?
(a) Convex mirror
(b) Concave lens
(c) Convex lens
(d) Plane mirror
(72) If the image is real then magnification would be ___
(a) Positive
(b) Zero
(c) Negative
(d) None of these
(73) On which of the following the refractive index does not depends ?
(a) Frequency
(b) Kind of material
(c) Wavelength
(d) The velocity of light
(74) The diameter of circular cross-section of the mirror is called ___
(a) Foal length
(b) Aperture
(c) Principal axis
(d) Radius of curvature
(75) Which type of image is obtained by a concave lens if the object paced except at infinite distance ?
(a) Virtual, erect and magnified
(b) Real, inverted and diminished
(c) Virtual, erect and diminished
(d) Real, inverted and magnified
(76) Twinkling of starts is due to ___ phenomena.
(a) Reflection
(b) Total internal reflection
(c) Refraction
(d) Dispersion
77. Velocity of light in vacuum is _______
a) 3 X 106 m s-1
b) 3 X 108 m s-1
c) 3 X 1010 m s-1
d) 3 X 1015 m s-1
78. What is the wavelength range of visible light?
a) 4 X 10-7 m to 8 X 10-7 m b) 4 X 10-9 m to 8 X 10-9 m c) 4 X 10-5 m to 8 X 10-5 m d) 4 X 10-6 m to 8 X 10-6 m
79. Which type of reflection will be represented by a light reflected from a book?
a) regular
b) irregular
c) both a and b
d) none of these
80. Through which of the following points , a ray passing through a centre of curvature and reflected by concave
mirror will pass through?
a) focus
b) centre of curvature c) pole
d) all the given
81. What is the relation between radius of curvature (R) and focal length (f) of a spherical mirror?
a) R = f/2
b) R = f
c) R = 3 f
d) R = 3 f
82. Which of the following is the formula for spherical mirror?
a)
1 1 1
 
v u f
b)
1 1 1
 
u v f
c)
1 1 1
 
v u f
d)
1 1
  f
u v
83. What is the formula to find the magnification of an image by a spherical mirror?
a) m =
u
v
b) m =
u
v
c) m =
v
u
d) m = -
v
u
84. The image of an object formed by a convex mirror is real. What are the signs taken for f, u and v?
a) +f , + u , +v
c) –f , + u, -v
b) +f , -u , +v
d) –f , -u , -v
85. The magnification of plane mirror is always ________
a) more than 1
b) 1
c) less than 1
d) zero
86. From which of the following letters we cannot obtain its laterally inverted image?
a) N
b) O
c) P
87. Which symbol is used for refractive index? a) 
88. 21 = ______
a) sin 1 . sin 2
b)
sin  2
sin 1
d) Q
c) 
b) v
c)
sin 1
sin  2
d)
89. Which of the following is the lens formula?
a)
1 1 1
 
u v f
b)
1 1 1
 
v u f
c)
1 1 1
 
u v f
1
v
d) f  
90. Which of the following is the formula for power of lens ?
a) P =
1
f
b) P = f
c) P = 2f
d) P =
f
2
1
u
sin 1
sin 2  2
d) 
SARVAYOGAM SCHOOL
Standard : 10 : SCIENCE [ lesson- 3]
Q.1 Choose the correct. [Marks : 50]
(1) On which of the following, refractive index of the medium does not depend ?
(a) pressure
(2) Green + Blue = ___
(b) nature of medium
(a) Cyan
(b) Yellow
(c) temperature
(c) magenta
(d) wavelength of light
(d) White
(3) In dispersion of white light by prism, which colour deviated maximum ?
(a) Yellow
(b) Green
(c) Red
(d) Violet
(4) Which part of the eye is responsible for varying the of call length of an eye lens?
(a) Pupil
(b) Iris
(c) Ciliary muscles
(d) Retina
(5) In whom the defect of eye far-sightedness is found ?
(a) Kids
(b) Elders
(c) Kids and elders both
(d) None of these
(6) Which colour obtained on the bottom of the spectrum by prism ?
(a) Red
(b) Violet
(c) Orange
(d) Green
(7) If the red and yellow light incident on green leaf, how will it appear ?
(a) Yellow
(b) Red
(c) White
(d) Black
(8) In which direction the rainbow observed in monsoon when sun is in east ?
(a) East
(b) Both east and west
(c) West
(d) Any direction
(9) In dispersion of white light by prism, which colour deviated minimum ?
(a) Red
(b) Green
(c) Violet
(d) Yellow
(10) Which lens from the following does a person use having far-sightedness defect ?
(a) Convex lens
(b) Cylindrical lens
(c) Concave lens
(d) Bifocal lens
(11) Which colour will be reflected when white light is incident on the blue and yellow pigment which are mixed ?
(a) Green
(b) Yellow
(c) Blue
(d) White
(12) Which colour is common from the colours reflected from the blue and yellow pigments ?
(a) Yellow
(b) Red
(c) Blue
(d) Green
(13) Red + Green + Blue = ___
(a) Cyan
(b) White
(c) Magenta
(d) Yellow
(14) What has the focal length of the objective of an astronomical telescope as compared to that of the focal
length of eye piece ?
(a) Infinite
(b) More
(c) Zero
(d) Less
(15) In whom the defect of eye near sightedness is found ?
(a) Elders
(b) Kids
(c) Kids and elders both
(d) None of these
(16) The colour of ray of light is due to which property ?
(a) frequency
(b) amplitude
(c) wavelength
(d) velocity
(17) Where does the image of a nearby object formed in the eye of a person having far-sightedness ?
(a) Behind the ratina
(b) Before the ratina
(c) None of these
(d) On the ratina
(18) How will a red shirt appear under red light ?
(a) Green
(b) Yellow
(c) Black
(d) Red
(20) How many primary colours does the white light have ?
(a) 7
(b) 2
(c) 3
(d) 5
(21) The eye lens remains ___ in a far-sightedness.
(a) none of these
(b) thick
(c) can not become thick or thin
(22) Which of the following statement is not true for far-sightedness ?
(d) thin
(a) The image of nearby object formed behind retina
(b) Eye lens remain thin, does not become thick as
per requirement
(c) This defect arises because of excessive
convergence of light rays.
(d) To correct this defect conex lens of appropriate focallength is used.
(23) In spectrum obtained by prism, which colour deviated maximum ?
(a) Red
(b) Blue
(c) Violet
(d) Yellow
(24) What is the complementary colour of blue ?
(a) Yellow
(b) Magenta
(c) Cyan
(d) Red
(25) Which optical instrument is used to observed a object placed far on the surface of earth ?
(a) Terestrial telescope (b) Compound microscope
(c) Astronomical telescope (d) Simple microscope
(26) Which of the following is responsible for producing coloured pictures on TV screen ?
(a) Dispersion of light (b) Superposition of light rays (c) Refraction of light
(d) Total internal reflection
(27) Which of the following colours is not a primary colour ?
(a) Red
(b) Yellow
(c) Green
(d) Blue
(28) The eyes lens remains ___ in a near-sightedness.
(a) thick or thin
(b) thin
(c) none of these
(d) thick
(29) What is the type of the final image in the astronomical telescope ?
(a) Virtual and magnified
(30) Red + Green = ___
(b) Real and diminished
(a) Cyan
(c) Real and magnified
(b) Yellow
(d) Virtual and diminished
(c) Magenta
(d) White
(31) What is type of image formed by eyepiece of compound microscope ?
(a) Virtual and diminished (b) Real and highly magnified (c) Real and magnified
(d) Virtual and magnified
(32) Where does the image of an object formed in the eye of a person having near sightedness ?
(a) Behind the retina
(b) Far away from retina
(c) On retina
(d) Infront of the retina
(33) Which colour will not be reflected when white light is incident on the blue pigment ?
(a) Red
(b) Blue
(c) Violet
(d) Green
(34) In case of near sightedness defect of the eye ___
(a) distant and nearby object can not be seen clearly
(b) nearby object can not be seen clearly
(c) distant object can not be seen clearly
(d) None of these
(35) Which optical instrument is used to observed the planets and stars in space ?
(a) Compound microscope
(b) Telescope
(c) Astronomical telescope
(d) Simple microscope
(36) Which method is employed for mixing primary colours in proper proportion ?
(a) Additive mixture method (b) Subtractive mixture method
(c) Dispersion of light
(d) None of these
(37) Which method is employed for pigments in order to make different coloured pigments ?
(a) Superposition method (b) Additive mixture method
(c) None of these
(d) Subtractive mixture mehod
(38) Which colour will not be reflected when white light is incident on the yellow pigment ?
(a) Violet
(b) Yellow
(c) Orange
(d) Green
(39) Rose appears red when white light incident on it, which colour of rays are reflected ?
(a) Red
(b) Blue
(c) Green
(d) Violet
(40) Which colour obtained on the top of the spectrum by prism ?
(a) Violet
(b) Green
(c) Red
(d) Yellow
(41) Which type of image is obtained by the retina of eye ? (a) Inverted (b) Real
(c) Virtual (d) Virtual and real
(42) An object reflecting all colours of incident light, what should be the colour of the object ?
(a) Yellow
(b) White
(c) Black
(d) Blue
(43) Which phenomenon is not responsible for the formation of rainbow ?
(a) Total Internal reflection
(b) Refraction
(c) Polarisation
(d) Dispersion of light
(44) In which opitcal instrument, the focal length of eye-piece is more compared to the focallength of objective ?
(a) Simpe microscope
(b) Compound microscope
(c) Telescope
(d) Astonomical telescope
(45) Which of the following colour is not a composite colour ?
(a) Red
(b) Yellow
(c) Cyan
(d) Magenta
(46) For which colour, the prism have a maximum refractive index ?
(a) Violet
(b) Green
(c) Orange
(d) Red
(47) Which lens from the following does a person use, having near-sightendness ?
(a) Cylindnical lens
(b) Concave lens
(c) Convex lens
(d) Bifocal lens
(48) In which part of the eye, image of an object is formed ?
(a) Pupil
(b) Retina
(49) Red + Blue = ___
(c) Cornea
(d) Ciliary muscles
(a) Cyan
(b) Magenta
(c) Yellow
(d) White
(50) Cylindrical lens is required to correct ___
(a) near-sightedness
(b) far-sightedness
(c) astigmatism
(d) colour blindness
(51) How many colours does the Sun's white light consist of ?
(a) 5
(b) 7
(c) 3
(d) 9
(52) Where does the image of a distant object formed in the eye of a person having far-sigtedness ?
(a) Behind the retina
(b) On the retina
(c) Before the retina
(d) Behind far away from the retina
(53) If green light is incident on red rose, how will it appear ?
(a) Red
(b) White
(c) Black
(d) Green
(54) A doctor is examining a patient's eye with the help of compound miroscope, what type of lens is closer to
the doctor's eye ?
(a) Contact lens
(b) Objective
(c) None of these
(d) Eyepiece
(55) Which of the following statement is not true for near-sightedness ?
(a) Eye lens does not become thin as per requirement.
(b) This defect arises because of less convergence of light rays.
(c) To correct this defect concave lens of appropriate focal length is used.
(d) The image of distant object formed before retina.
(56) Splitting of white light into seven colours is known as ___
(a) Dispersion
(b) Interference
(c) Reflection
(57) What is the complementary colour of red ? (a) Yellow
(b) Green
(d) Refraction
(c) Magenta
(d) Cyan
(58) Where does the image of close object formed in the eye of a person having near sightedness ?
(a) Ahead of retina
(b) On the pupil
(59) In reflected white light thin film appear in ___
(c) Behind the retina
(a) Red
(b) White
(d) On the retina
(c) Black
(d) Colour
(60) What is the type of the image formed by objective lens of compound microscope ?
(a) Virtual and magnified (b) Real and diminished
(c) Real and highly magnified
(d) Real and magnified
(61) An object affording all colour of incident of light, what should be the colour of that object ?
(a) Black
(b) Yellow
(c) White
(d) Blue
(62) Primary pigments are ___
(a) Green, Blue, Violet
(b) Yellow, magenta, cyan
(c) Blue, Yellow, Red
(d) Yellow, Green, Magenta
(63) Where should an object be kept to get its image virtual, erect and enlarge for a convex lens ?
(a) On F
(b) Between F and O
(c) On 2F
(d) Between F and 2F
(64) What is the complementary colour of magenta ?
(a) Red
(b) Blue
(c) Green
(d) Yellow
65. What is the lens like structure in the eye called ?
a) retina
b) eye lens
c) iris
d) pupil
c) iris
d) retina
66. Where does the image form in a human eye?
a) cornea
b) pupil
67. What is the function of cilliary muscles ?
a) to vary the size of pupil
b) to form the image
c) to vary the thickness of eye lens as per requirement
d) to detect vision
68. The focal length of an eye lens is changed due to the action of ____
a) pupil
b) retina
c) cillary muscles
d) cornea
69. In human eye, the image of an object is formed at ______
a) iris
b) pupil
c) retina
d) cornea
70. _______ lens is used to correct the defect of vision termed as presbyopia
a) convex
b) concave
c) biofocal
d) contact
71. Biofocal lenses consist of concave and convex lenses. Glasses using biofocal lenses are needed by people
who have ______
P. near – sightedness
a) only Q
b) only R
Q. far sightedness
R. night blindness
c) only P
d) both P and Q
72. Which phenomenon is responsible for the twinkling of stars?
a) atmospheric reflection b) atmospheric refraction
c) reflection
d) total internal reflection
73. Which colour of light gets scattered maximum due to atmosphere?
a) Blue
b) yellow
c) Green
d) red
74. What is the time difference between actual sunset and apparent sunset?
a) 2 second
b) 20 second
c) 2 minute
d) 20 minute
75. Due to which phenomenon of light does a Tyndall effect result?
a) reflection
b) refraction
c) scattering
d) dispersion
76. For which of the following cases , the total internal reflection of light will be possible?
a) Angle of incidence is less than critical angle
b) angle of incidence is equal to critical angle
c) angle of incidence is more than critical angle
d) angle of incidence is equal to angle of refraction
77. A kind of mirage observed in very cold regions in which distant objects appear to be hanging midway in the
atmosphere. This phenomenon is called ____
a) mirage
b) refraction
c) looming
d) dispersion
78. For light point of view, cold air means _______ medium and hot air means __________ medium.
a) denser , rarer
b) rarer , denser
c) rarer , opaque
d) denser , opaque
c) downward direction
d) random direction
79. In looming the total internal reflection is in ________
a) upward direction
b) all direction
80. In summer , as we move up above the surface of the earth , the refractive index _____________
a) decreases continuously b) remains steady
c) changes randomly
d) increases continuously