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Chapter 12 Review: The Refraction of Light

Total questions: 25

Worksheet time: 18mins

Name
Class
Date
1.
A student placed a pencil in a cup of water.  The pencil appears broken because light-
a)
always travels in a straight line
b)
bends when it passes through water
c)
makes the water in the glass evaporate
d)
reflects the pencil on the water's surface
2.
Refraction is the bending of a wave disturbance as it passes from one _________ into another.
a)
glass
b)
medium
c)
area
d)
boundary
3.
When light passes at an angle to the normal from one material into another material in which its speed is higher 
a)
it is bent toward the normal.
b)
it always lies along the normal.
c)
it is unaffected.
d)
it is bent away from the normal.
4.
When light passes at an angle to the normal from one material into another material in which its speed is lower
a)
it is bent towards the normal.
b)
it always lies along the normal.
c)
it is unaffected.
d)
it is bent away from the normal.
5.
Which of the following describes what will happen to a light ray incident on a glass-to-air boundary at greater than the critical angle?
a)
total internal reflection
b)
total external transmission
c)
partial reflection, partial transmission
d)
partial reflection, total transmission
6.
Atmospheric refraction of light rays is responsible for which of the following effects? 
a)
spherical abberation
b)
mirages
c)
chromatic abberation
d)
total internal reflection in a gemstone
7.
Which color of light is most refracted during dispersion by a prism?
a)
red
b)
yellow
c)
green
d)
violet
8.
What type of image is formed when rays of light actually intersect?
a)
real
b)
virtual
c)
curved
d)
projected
9.
Light has the lowest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
a)
diamond
b)
water
c)
flint glass
d)
barium glass
10.
The formula to calculate the refractive index is
a)
n=cv
b)
n=v/c
c)
n=c/v
d)
v=nc
11.
Swimming pools and the ocean look shallower than they really are due to:
a)
reflection 
b)
dispersion
c)
refraction
d)
total internal reflection
12.
Light has the highest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
a)
diamond
b)
water
c)
flint glass
d)
barium glass
13.

What is a line drawn at 90° to a surface called?

a)

incident ray

b)

normal line

c)

refracted ray

d)

tangent

14.

What direction does the ray bend when entering a more optically dense material, where the wave travels more slowly?

a)

Towards the normal.

b)

Away from the normal.

c)

No change.

d)

Answer is not listed above.

15.

What is the speed of light in water of refractive index 1.33?

a)

3.0×108m/s

b)

2.0×108m/s

c)

2.3×108m/s

d)

3.9×108m/s

16.

Which of the following is a correct representation of snell's law?

a)

n1sinθ2=n2sinθ1

b)

n1sinθ1=n2sinθ2

c)

n2sinθ1=n1sinθ2

d)

n1/sinθ1=n2/sinθ2

17.

Based on the image, which medium has a larger index of refraction?

a)

Medium 1 has a larger index of refraction.

b)

Medium 2 has a larger index of refraction.

c)

Both mediums have the same index of refraction.

d)

Cannot be determined.

18.

Based on the image, as light passes from medium 1 to medium 2

a)

light speeds up and bends towards the normal

b)

light speeds up and bends away from the normal

c)

light slows down and bends towards the normal

d)

light slows down and bends away from the normal

19.

Formation of rainbow is due to..........

a)

refraction of light

b)

scattering of light

c)

dispersion of light

d)

atmospherics refraction

20.

The principal behind optical fibres is

a)

total internal reflection

b)

total external reflection

c)

total internal refraction

d)

diffraction

21.

What is total internal reflection

a)

Where a wave is refracted at the boundary between a dense medium and a less dense medium when the angle of incidence is greater than the critical angle.

b)

Where a wave is refracted at the boundary between a dense medium and a less dense medium when the angle of incidence is smaller than the critical angle.

c)

Where a wave is reflected at the boundary between a dense medium and a less dense medium when the angle of incidence is greater than the critical angle.

d)

Where a wave is reflected at the boundary between a dense medium and a less dense medium when the angle of incidence is smaller than the critical angle.

22.

What is the angle of reflection (θr) in the image?

a)

56o

b)

90o

c)

124o

d)

34o

23.

Light is incident normally on the surface between two medium. What is the angle of refraction?

a)

90o

b)

180o

c)

0o

d)

30o

24.

A ray of light in air is incident at an angle on one side of a rectangular glass block, as shown. Which ray diagram correctly describes the complete path of the ray of light?


(Determine if light bends towards or away from normal at each boundary)

a)
b)
c)
d)
25.

Which letter refers to the angle of refraction?

a)

A

b)

B

c)

C

d)

D

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