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Light and Optics 8.1-8.4

Total questions: 37

Worksheet time: 37mins

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.

Light can pass easily through TRANSPARENT objects. Which object would be transparent.

a)

shoe

b)

fishbowl

c)

me

4.

When an object blocks the light, it is called?

a)

glasses

b)

book

c)

opaque

5.
Light bounces when it is 
a)
reflected
b)
absorbed
c)
refracted
6.
Light bends when it is 
a)
refracted
b)
reflected
c)
absorbed
7.
mirror
a)
absorbs
b)
reflects 
c)
refracts
8.
smooth, shiny surfaces
a)
reflect
b)
refract
c)
absorb
9.
Which images are opaque?
a)
A & C
b)
A,C,E, & F
c)
D, E, & F
d)
A & E
10.
Which explains why the fork looks different under water?
a)
light can't pass through the glass
b)
the wavelength of light lengthens
c)
the amount of light increases when going through water
d)
light is refracted at an angle
11.
Allows most light through
a)
eflection
b)
Refraction
c)
Translucent
d)
Transparent
12.

A form of energy we can see.

a)

heat

b)

electricity

c)

light

d)

sound

13.
The ray of light that strikes a reflecting surface is called ________.
a)
incident ray
b)
reflected ray
c)
normal ray
d)
none of the above
14.
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
15.
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
16.
Which of these is the best reflector of light?
a)
shiny metal
b)
white paper
c)
carpet
d)
wood
17.

Which diagram represents specular reflection?

a)

A

b)

B

18.
Law of reflection state that - The angle of incidence is .................. to the angle of reflection.
a)
equal
b)
double
c)
half
19.

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

a)

A

b)

B

c)

C

d)

D

20.

Which is the reflected ray?

a)

A

b)

B

c)

C

d)

D

21.

Which is the reflected ray?

a)

A

b)

B

c)

C

d)

D

22.

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

23.

What is the object helps the customers at a show store to choose their favourite shoes?

a)

periscope

b)

concave mirror

c)

plane mirror

d)

convex mirror

24.

What is the object helps the customers at a salon to look the new hair style of his back of head?

a)

periscope

b)

convex mirror

c)

plane mirror

d)

concave mirror

25.

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

26.

Why does the straw appear to be bent?

a)

light is reflected

b)

light is absorbed

c)

light is turned

d)

light is refracted

27.

Which mirror is shown in the figure?

a)

convex mirror

b)

concave mirror

c)

plane mirror

d)

silver mirror

28.

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

29.

The man's image appears to be-

a)

real

b)

virtual

c)

singing about who they are inside

d)

looking for a way out

30.

The man's image appears to be-

a)

larger

b)

smaller

c)

same size

d)

laughing at him

31.

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

32.

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

33.
Swimming pools and the ocean look shallower than they really are due to:
a)
reflection 
b)
dispersion
c)
refraction
d)
total internal reflection
34.

Based on the image, which medium has higher density?

a)

Medium 1

b)

Medium 2

c)

Both mediums are same

d)

Cannot be determined.

35.

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

a)

light bends towards the normal

b)

light bends away from the normal

36.

Why the light did not bend?

a)

It is not refraction

b)

Light travel through normal line

c)

Light travel through same medium

37.

Light travel from air to glass. Which is the direction of the light ray

a)

A

b)

B

c)

C

d)

D

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