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Light and Optics 8.1-8.3

Total questions: 20

Worksheet time: 12mins

Name
Class
Date
1.

Why does this tree make a shadow?

a)

It blocks light.

b)

It vibrates.

c)

It gives off heat.

2.

How does light travel?

a)

In waves

b)

in a straight path

c)

does not move

3.
Allows most light through
a)
eflection
b)
Refraction
c)
Translucent
d)
Transparent
4.
what is the angle between the incident ray and the normal called as
a)
angle of incidence
b)
angle of reflection
c)
angle of convergent
d)
angle of divergent
5.
If the angle of incidence is 45 degree, what is the angle between the incident ray and reflecting surface
a)
45
b)
90
c)
180
d)
none of the above
6.
Which of these is the best reflector of light?
a)
shiny metal
b)
white paper
c)
carpet
d)
wood
7.
Law of reflection state that - The angle of incidence is .................. to the angle of reflection.
a)
equal
b)
double
c)
half
8.

In the diagram, which letter represents the angle of incidence?

a)

A

b)

B

c)

C

d)

D

9.

Which is the reflected ray?

a)

A

b)

B

c)

C

d)

D

10.

What is the object helps the dentist to see the patient's dental condition?

a)

periscope

b)

convex mirror

c)

plane mirror

d)

concave mirror

11.

What is the object helps navy personnel in a submarine to see an object at the surface at the sea?

a)

periscope

b)

concave mirror

c)

plane mirror

d)

convex mirror

12.

Which mirror is shown in the figure?

a)

convex mirror

b)

concave mirror

c)

plane mirror

d)

silver mirror

13.

Type of mirror used as a side mirror on a vehicle to provide a wide angle view...

a)

Plane mirror

b)

Convex mirror

c)

Concave mirror

14.

If the man is 4 m from the mirror, his image is how far from the mirror?

a)

2 m

b)

4 m

c)

8 m

15.

A shopkeeper wants to keep an eye on his store in order to prevent shoplifting. What could the shopkeeper hang on the wall in order to see a wider image of his store and his customers?

a)

a convex mirror

b)

a concave mirror

c)

a convex lens

d)

a concave lens

16.

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

a)

Virtual and upright

b)

Virtual and inverted

c)

Real and inverted

d)

Real and upright

17.

Which of the following involves the application of plane mirror?

a)

Make up mirror

b)

Magnifying glass

c)

Car's side view

d)

Kaleidoscope

18.
According to the Law of reflection, a light ray striking a mirrow
a)
continues moving through the mirror in the same direction
b)
moves into the mirror at a slightly different angle
c)
bounces off the mirror toward the direction it came from
d)
bounces off the mirror a the same angle it hits.
19.

If you're standing 12 meters in front of a plane mirror, how far away is your image from you?

a)

6

b)

12

c)

18

d)

24

20.
Opaque means...
a)
No light passes through it
b)
All light passes through it
c)
Some light passes through it