Light strikes the top surface of a glass block at an angle of 15 ° as shown. The refractive index of glass is 1.5.

What is the angle of refraction r ?

a
50 °
b
40 °
c
23°
d
10 °
Question 2 (1 point)
The diagram shows a ray of monochromatic light passing through a semi-circular glass block.

What is the refractive index of the glass?

a
1.31
b
1.56
c
0.77
d
0.64
Question 3 (1 point)
What causes the change in direction when light travels from air into glass?

a
The speed of the light changes
b
The frequency of the light changes
c
The colour of the light changes
d
The amplitude of the light changes
Question 4 (1 point)
Which diagram shows what happens when a ray of light passes through a glass prism?

a
A
b
B
c
C
d
D
Question 5 (1 point)
Each prism or mirror in a periscope turns a ray of light through an angle of:

a
90
b
180
c
45
d
360
Question 6 (1 point)
Light is refracted at a boundary between two media of refractive indices n1 and n2 respectively as shown below.

Which of the following statements is TRUE ?

a
The frequency of the light in medium 1 is greater than in medium 2
b
If the angle x increases, angle y will increase
c
Light travels faster in medium 2 than it does in medium 1
d
n1 is greater than n2
Question 7 (1 point)
The diagram below shows the passage of a ray of light through a rectangular glass block.

From the diagram, the refractive index of the block could be found from:

a
Sine m/ Sine n
b
Sine 90 / Sine n
c
Sine m/ Sine l
d
Sine l / Sine 90
Question 8 (1 point)
This question refers to the following diagram.

A ray of light passes from paraffin into air at an angle of incidence of 28°. if the refractive index of paraffin is 1.44, the value of sine x is:

a
sine 28 / 1.44
b
1.44 / sine 62
c
1.44 x sine 28
d
1.44 / sine 28
Question 9 (1 point)
The refractive index of a transparent medium with a critical angle , c , for light travelling from the medium to air is:

a
sine 90 / sine c
b
1 / c
c
sine c
d
90 / sine c