Light GCSE (TA Physics)
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1.
Luminous
Objects that emit their own light.
2.
Non-luminous
Object that cannot produce light but may reflect it.
3.
Transparent
Describes an object that allows light to pass through it easily.
4.
Opaque
Describes an object that does not allow light to pass through.
5.
Law of Reflection
The angle of incidence is equal to the angle of reflection.
6.
Plane mirror
A flat mirror that produces an upright, virtual image the same size as the object.
7.
Virtual image
An image that forms at a location from which light rays appear to come but do not actually come.
8.
Real image
An image that is formed by converging light rays and that can be displayed on a screen.
9.
Refraction
The bending of a light caused by a change in its speed as it moves from one medium to another.
10.
Dispersion
The process in which white light separates into colours
11.
Spectrum
Wavelengths of visible light that are separated (into a range of colours) when a beam of white light passes
through a prism.
Electromagnetic
(EM) waves
Transverse waves that transfer electric and magnetic energy through the vacuum of space.
Total Internal
Reflection
The complete reflection that takes place within a substance when the angle of incidence of light striking the
surface boundary is less than the critical angle.
14.
Critical Angle
The smallest angle of incidence for which light is totally internally reflected.
15.
Optical Fibre
A thin glass tube designed to carry information in the form of light through total internal reflection.
16.
Convex Lens
A lens in which the center is thicker than the edges so it bends light rays inwards (converges).
17.
Concave Lens
A lens that is thicker at the edges than in the middle that bends light rays away from one another (diverges).
18.
Focal Length
The distance from the center of the lens to the point at which the light rays meet in sharp focus.
19.
Focal Point
The point at which rays parallel to the optical axis meet or converge.
12.
13.
Luminous
Objects that emit their
own light.
Non-luminous
Object that cannot
produce light but may
reflect it.
Transparent
Describes an object
that allows light to
pass through it easily.
Opaque
Describes an object
that does not allow
light to pass through.
Law of Reflection
The angle of incidence
is equal to the angle of
reflection.
Plane mirror
A flat mirror that
produces an upright,
virtual image the same
size as the object.
Virtual image
An image that forms at a
location from which light
rays appear to come but
do not actually come.
Real image
An image that is formed
by converging light rays
and that can be
displayed on a screen.
Refraction
The bending of a light
caused by a change in its
speed as it moves from
one medium to another.
Dispersion
The process in which
white light separates
into colours
Spectrum
Wavelengths of visible light
that are separated (into a
range of colours) when a beam
of white light passes through a
prism.
Electromagnetic (EM)
waves
Transverse waves that
transfer electric and
magnetic energy through
the vacuum of space.
Total Internal
Reflection
The complete reflection that takes
place within a substance when the
angle of incidence of light striking
the surface boundary is less than
the critical angle.
Critical Angle
The smallest angle of
incidence for which light
is totally internally
reflected.
Optical Fibre
A thin glass tube designed
to carry information in
the form of light through
total internal reflection.
Convex Lens
A lens in which the center
is thicker than the edges
so it bends light rays
inwards (converges).
Concave Lens
A lens that is thicker at the
edges than in the middle that
bends light rays away from
one another (diverges).
Focal Length
The distance from the
center of the lens to the
point at which the light
rays meet in sharp focus.
Focal Point
The point at which rays
parallel to the optical
axis meet or converge.
Light GCSE (TA Physics)
NAME: ________________________
7 Written Questions
1. Electromagnetic (EM) waves
2. Optical Fibre
3. Convex Lens
4. Non-luminous
5. Total Internal Reflection
6. Law of Reflection
7. Luminous
6 Multiple Choice Questions
1. Virtual image
a. An image that is formed by converging light rays and that can be displayed on a screen.
b. The smallest angle of incidence for which light is totally internally reflected.
c. The process in which white light separates into colours
d. An image that forms at a location from which light rays appear to come but do not actually
come.
2. Concave Lens
a. The distance from the center of the lens to the point at which the light rays meet in sharp
focus.
b. A lens in which the center is thicker than the edges so it bends light rays inwards
(converges).
c. A lens that is thicker at the edges than in the middle that bends light rays away from one
another (diverges).
d. Describes an object that does not allow light to pass through.
3. Spectrum
a. Describes an object that allows light to pass through it easily.
b. The process in which white light separates into colours
c. The angle of incidence is equal to the angle of reflection.
d. Wavelengths of visible light that are separated (into a range of colours) when a beam of
white light passes through a prism.
4. Dispersion
a. Objects that emit their own light.
b. The point at which rays parallel to the optical axis meet or converge.
c. The process in which white light separates into colours
d. The angle of incidence is equal to the angle of reflection.
5. Opaque
a. Objects that emit their own light.
b. Describes an object that does not allow light to pass through.
c. Object that cannot produce light but may reflect it.
d. Describes an object that allows light to pass through it easily.
6. Real image
a. An image that forms at a location from which light rays appear to come but do not actually
come.
b. Object that cannot produce light but may reflect it.
c. The smallest angle of incidence for which light is totally internally reflected.
d. An image that is formed by converging light rays and that can be displayed on a screen.
6 True/False Questions
1. The smallest angle of incidence for which light is totally internally reflected. → Critical Angle
True
False
2. The bending of a light caused by a change in its speed as it moves from one medium to
another. → Focal Point
True
False
3. The distance from the center of the lens to the point at which the light rays meet in sharp
focus. → Focal Length
True
False
4. The point at which rays parallel to the optical axis meet or converge. → Focal Point
True
False
5. Describes an object that allows light to pass through it easily. → Opaque
True
False
6. A flat mirror that produces an upright, virtual image the same size as the object. → Plane
mirror
True
False