Name :
(
)
Class:
Date
Science Physics Revision
Open Book Test
Topics: Light; Electromagnetic Spectrum
1.
Which of the above illustrates the correct ray diagram that allows the eye to
see the image of the object O in the mirror.
2.
The diagram below shows the refraction of a ray of light by a rectangular
block of an unknown material.
What is the refractive index of the block?
A 0.49
B 1.05
C 1.18
D 2.05
1
3.
Infra-red, Ultraviolet and Radiowaves are part of the electromagnetic
spectrum. What is the correct order of increasing frequency?
Lowest frequency
A
B
C
D
Ultraviolet
Infra-red
Radio waves
Radio waves
highest frequency
Infra-red
Ultraviolet
Infra-red
Ultraviolet
Radiowaves
Radio waves
Ultraviolet
Infra-red
4.
Which of the following is correctly matched?
Shortest wavelength
Longest wavelength
A. visible light
gamma rays
B. X-rays
ultraviolet rays
C. gamma rays
radio waves
D. ultraviolet rays
infrared radiation
5.
Which ray below shown passing through a convex lens is correct?
A
B
C
D
6.
The image produced by a plane mirror is not
A
B
C
D
laterally inverted.
real.
the same size as the object.
upright.
2
7.
An observer looks straight through a rectangular glass block at an object P,
as shown below. How does the object appear to the observer?
observer
A
B
C
D
8.
P
diminished
farther
magnified
nearer
The image of an object formed is smaller than the object when the object is placed
25 cm from a converging lens. Placed at a distance of 23 cm, the image of the object
becomes slightly bigger than the object. What is the approximate focal length of
the lens?
A
B
C
D
9.
90o
2 cm
6 cm
12 cm
24 cm
Which of the following electromagnetic waves has the lowest frequency?
A
B
C
D
infra-red
light
microwaves
ultraviolet
10.
A ray of light is incident on the surface of water at an angle of incidence of 60 o and
gets refracted at an angle of 40.6o. The refractive index of water is
A. 1.52
B. 1.33
C. 1.62
D. 1.72
(
)
11.
A man is moving at a speed of 1.5 m/s away from a tall mirror. With reference to the
image, the man is moving away with a velocity of
A. 0.75 m/s
B. 2.25 m/s
C. 1.5 m/s
D. 3.0 m/s
(
)
12.
Which of the following device does not make use of electromagnetic waves in its
operation ?
A. A camera
B. A radio set
C. A television set
D. A loudspeaker
(
)
3
13.
The diagram shows the action of a converging lens. Which statement best describes
the image formed.
A.
C.
14.
15.
It is real, erect and magnified.
It is real, inverted and
magnified.
B.
D.
It is real, erect and diminished.
It is virtual, inverted and magnified.
(
)
In front of and to the right of plane mirror, there is a pin. If the pin is viewed from the
left-hand side, which position, A to D, can the image of the pin be seen?
(
)
Red light travelling in glass strikes a glass-air boundary. Some light is reflected and
some is refracted. Which diagram correctly shows the reflection and refraction?
(
4
)
16.
The diagram shows an object placed further than point P in front of a thin converging
(convex) lens. The principal foci of the lens are at F1 and F2.
Where is the image formed by the lens?
A
C
At infinity
Between Q and F2
B
D
Between O and F2
Beyond Q
(
)
17. The number 9 was drawn on a piece of paper which was placed in front of a plane
mirror, as shown in the diagram.
How would the image seen in the mirror appear?
A
B
C
D
(
)
18. The figure below shows a ray of light incident on a plane mirror M1 at 40°. What is the
angle of reflection, r, at mirror M2?
A
20°
B
40°
C
5
50°
D
80°
(
)
19.
The position of John and an object is as shown in the diagram below. At which point
would the object appear to John?
A
B
C
D
Mirror
Object
John
(
)
20. The ray diagram shows the formation of a real image by a converging lens.
lens
image
object
scale
2cm
What is the focal length of the lens?
A
3 cm
B
4 cm
C
7 cm
D
12 cm (
)
The ray diagram below shows the refraction of a light ray passing from a glass block
into
air. Refer to the diagram to answer Question 21and 22.
39 o
Glass block
20 o
Air
21.
From the ray diagram, the angle of refraction is _______________.
A
22.
20 o
B
39 o
C
51 o
D
70 o
(
)
Given that the refractive index of the glass block is 1.5, what is the speed of the light
ray as it travels through the glass block? [Given: Speed of light in air = 3 x 108 ms-1]
A
1.5 x 108 ms-1
B
2.0 x 108 ms-1
C
3.0 x 108 ms-1
D
4.5 x 108 ms-1
6
(
)
23.
Which of the following statement is false about electromagnetic waves?
A
Only high frequency electromagnetic waves transfer energy from one place to
another.
B
The higher the frequency of a wave, it’s frequency becomes lower.
C
Electromagnetic waves obey the laws of reflection.
D
Electromagnetic waves can travel through vacuum.
(
)
24(a) Arrange the following components of the electromagnetic spectrum in ascending
order of wavelengths.
[1]
Radio waves
Infra red rays
visible light
X rays
___________________________________________________________________
(b)
Which of the component listed above has the highest frequency?
[1]
___________________________________________________________________
25(a)(i)The diagram below shows the position I of the image formed by a plane mirror of an
object O.
Continue the two rays drawn leaving O to show how they would be reflected at the
mirror to form the image at I.
[2]
(ii)
Is the image produced real or virtual? Explain your answer.
[2]
___________________________________________________________________
(b)
AB represents a ray of light striking a rectangular glass block at an angle of
incidence as shown.
7
A
B
(i)
(ii)
(iii)
Complete the diagram to show the path of the ray through the block and as it leaves
the glass block.
[2]
Draw a normal line to the incident ray AB and label the angle of refraction as the ray
enters the glass block.
[2]
State one effect of refraction.
[1]
___________________________________________________________________
26(a) The diagram below shows the image I of an object O produced by a converging
lens. Complete the ray diagram to show two rays passing from the object to the
image.
Mark the positions of the lens L and the relevant focal point F on the diagram.
[2]
O
I
b)
Suggest one instrument which uses a converging lens in this way.
[1]
_________________________________________________________________
27(a) Complete the following ray diagram, drawn to scale, of an object of height
2cm, 3 cm away from the lens whose focal length is 1.5 cm.
State the nature of the image formed.
[4]
Lens
8
Nature of image formed:
[2]
___________________________________________________
(b)
Give an example of the use of such an arrangement.
[1]
____________________________________________________
28
(a)
When light passes through a glass window, it slows down and speeds up again
when it leaves. The speed of light in glass is two thirds of the speed of light in air.
Using this information, show how you would calculate the refractive index of glass
and hence find the value.
[2]
(b)
An object 4 cm tall is placed on the axis of a converging lens (of focal length
cm) at a distance of 5 cm from the optical centre of the lens.
(i)
10
Draw a ray diagram to show how the image is formed.
[2]
(ii)
State the height of the image and its distance from the lens.
[2]
(iii)
Without drawing further ray diagrams, state the characteristics of the image when
it is at a distance of 7.5 cm from the lens. (Note that exact numerical answers are
not required.)
[2]
9
29. a)
The diagram below shows a convex lens L used to produce an image of an object
O. F is the principal focus of the lens.
L
O
P
b)
x
F
i.
Draw two rays to find the image. Label the image I.
(3)
ii.
What is the nature of the image formed?
(2)
The diagram shows an object X placed in front of a mirror.
mirror
X
i.
Draw a ray to show how the eye sees the image of X.
(2)
ii.
Label the angle of incidence and angle of reflection for the ray as i and r
respectively.
(1)
10
(b) Copy and complete the ray diagram given below on the writing papers to locate
the image of the object, O. Label the image, I. Hence, state two characteristics of
Thin
converging
lens
the image, I, formed.
O
[4]
Principle axis
Focal length
30(a) The diagram shows the image of an object as formed by a converging lens.
lens
object
image
(i)
Complete the ray diagram above.
[2]
(ii)
Label the focal point ‘F’ on the diagram above.
[1]
(iii)
In the diagram , indicate the focal length , f , of the lens.
(iv)
Describe the nature of the image formed other than that it is inverted , as shown
in diagram.
[2]
[1]
_______________________________________________________________
(b)
Which words complete the following sentence?
[1]
The refractive index of a medium is the ratio of the speed of light in a __ (1)____
to the speed of light in the _____(2)______.
(1) ________________________
(2) ________________________
11
(c)
On the diagram below, draw the path of the light ray after it leaves the glass block.
[1]
12