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Light Quiz - Reflection, Refraction and Lens

Total questions: 15

Worksheet time: 11mins

Name
Class
Date
1.
The velocity of light in vacuum is _______ m/s
a)
3x108
b)
3x1012
c)
3x106
d)
3x1010
2.

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

a)

56o

b)

90o

c)

124o

d)

34o

3.

The diagram shows a patient having her eyes tested. A chart with letters on it is placed behind her and she sees the chart reflected in a plane mirror.


How far away from the patient is the image of the chart?

a)

2 m

b)

4 m

c)

5 m

d)

7 m

4.

Which of the following characteristics are correct for the image formed in a plane mirror?


I. Upright

II. Inverted

III. Real

IV. Same size as the object

V. Virtual

a)

I, II, III

b)

I, III, IV

c)

I, IV, V

d)

III, IV, V

5.
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
6.

A light ray is incident from water to air. Which of the refracted rays is correct?

a)

A

b)

B

c)

C

d)

D

7.

Which of the following factors contributes to the bending of light?

a)

Change of speed of light

b)

Change of density of light

c)

Change of colour of light

d)

Change of energy of light

8.
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
9.

A light ray is incident into a glass block as shown.


Which of the following is the correct expression to find the refractive index of the glass block?

a)

sin p / sin q

b)

sin p / sin s

c)

sin q / sin r

d)

sin s / sin p

10.

When the light passes out of the glass, back into the air

a)

It bends away from the normal

b)

It does not bend

c)

It bends towards the normal

d)

It continues to be the normal

11.

A ray of light travels from air into a glass block.


Which diagram correctly shows the path of the ray through the glass block?

a)

A

b)

B

c)

C

d)

D

12.

Which block is made from the material with a refractive index of 1.52?

a)

A

b)

B

c)

C

d)

D

13.

Which figure represents the path light takes through a converging lens?

a)
b)
c)
d)
14.

Which of the following best describes the image for a thin diverging lens that forms whenever the magnitude of the object distance is less than that of the lens' focal length?

a)

inverted, enlarged and real

b)

upright, enlarged and virtual

c)

upright, reduced and virtual

d)

inverted, reduced and real

15.

Converging lens are often found in our daily lives. One of the examples is the spotlight. The spotlight produces a distant image when the light bulb is placed at the focal point.

What type of image is produced?

a)

real, inverted, diminished

b)

real, upright, same size

c)

virtual, inverted, diminished

d)

virtual, upright, magnified