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Class 8th Light O8P1X

Total questions: 55

Worksheet time: 37mins

Name
Class
Date
1.

The angle between the reflected ray and the normal line is called the:

a)

Angle of incidence

b)

Angle of reflection

c)

angle of convergent

2.

If the angle of incidence is 45 degree, what is the angle of reflection?

a)

90°

b)

45°

c)

180°

3.

The Law of reflection states that - The angle of incidence is .................. the angle of reflection

a)

equal to

b)

double

c)

half

4.

The ray of light that strikes a mirror is called ________

a)

an incident ray

b)

a reflected ray

c)

a normal ray

5.

Why can you see most objects?

a)

they emit light

b)

light refracts through them

c)

light reflects off them

d)

They absorb light

6.

The principle behind the appearance of a rainbow in the sky?

a)

a. Diffusion

b)

b.Dispersion

c)

c.Reflection

d)

d. Refraction

7.
Sunlight is
a)
not light at all
b)
red light
c)
yellow light
d)
white light
8.
Light enters this part of the eye first.
a)
Retina
b)
Cornea
c)
Lens
d)
Cones
9.

Light travels in straight lines until reflected by another object. Which illustration best shows the light being reflected?

a)
b)
c)
d)
10.

At what angle will the reflected ray strike the second mirror?

a)

30

b)

45

c)

60

d)

90

11.

What is the angle of incidence?

a)

10°

b)

30°

c)

60°

d)

80°

12.

What is the angle of incidence?

a)

10°

b)

30°

c)

60°

d)

80°

13.

Below are example of light source except?

a)

Sun

b)

Lamp

c)

Fire

d)

Moon

14.

How does light travels?

a)

Light travels in a straight line

b)

Light travel in a circular line

15.

What is the law of reflection?

a)

angle of incidence = angle of reflection

b)

angle of incidence > angle of reflection

c)

angle of incidence < angle of reflection

16.

What is the angle of normal line to the surface?

a)

30o

b)

45o

c)

60o

d)

90o

17.

The splitting of white light into spectrum of color is called?

a)

Reflection

b)

Diffraction

c)

Dispersion

d)

Interference

18.

What this phenomenon is called?

a)

Difraction

b)

Dispersion

c)

Disconnection

19.

If white light enters red filter which color will pass through?

a)

Blue

b)

Violet

c)

Green

d)

Red

20.

When we see red car, which color is absorbed by the car?

a)

Red

b)

All except Red

21.

When we see red car, which color is Reflected by the car?

a)

Red

b)

Blue

22.

1. Sami is 50 cm from a vertical mirror. He moves 20cm away. The distance between his image and himself is then ………….

a)

100cm

b)

120cm

c)

140cm

d)

40cm

23.

The visible light is composed of several spectral of colors with different frequencies and wavelength. What is the correct order of arrangement of these colors?

a)

a. VIGBYOR

b)

b. ROYGVIB

c)

C. ROYGBIV

d)

d.ROYBGIV

24.
Which color absorbs all light?
a)
White
b)
Black
c)
Orange
d)
Green
25.
Which color reflects all light?
a)
White
b)
Black
c)
Orange 
d)
Green
26.
Material that allows light to pass through allowing you to see "clearly" to the other side
a)
opaque
b)
translucent
c)
transparent
27.
What is the short, thick nerve through which signals travel to the brain from the eye?
a)
Lens
b)
Retina
c)
Optic Nerve
d)
Cornea
28.
What is reflection in simple terms?
a)
Soaks up light
b)
Passes through
c)
light bounces off
29.
____________________ is the hole through which light enters the eye.
a)
Cornea
b)
Iris
c)
Retina
d)
Pupil
30.
_________________ is the transparent front surface of the eye
a)
Pupil
b)
Cornea
c)
Lens
d)
Iris
31.
Indicate the color a pure red apple would appear if illuminated by blue light.  
a)
red
b)
white
c)
black
d)
green
32.
Indicate the color a pure red apple would appear if illuminated by red light.  
a)
red
b)
white
c)
black
d)
green
33.
Indicate the color a pure red apple would appear if illuminated by white light.  
a)
red
b)
white
c)
black
d)
green
34.

What does a transparent material do?

a)

lets all or most of the light go through

b)

lets some light go through

c)

prevents all light from going through

35.
Which of these best explains why a student can see her reflection in a computer monitor when the monitor is turned off?
a)
Black objects absorb most of the light striking them
b)
The glass allows light to be transmitted through it.
c)
Smooth, shiny objects reflect a great amount of light.
d)
Computers produce light when they are being used.
36.
Which parts of your eye are transparent?
a)
retina
b)
optic nerve
c)
cornea and lens
d)
iris
37.
In dim light, your pupil will be 
a)
larger
b)
smaller
38.
In bright light, your pupil will be
a)
larger
b)
smaller
39.

The part of your eye that gives it its color. It is a muscle that controls the size of your pupil.

a)

cornea

b)

lens

c)

pupil

d)

iris

40.
The back of the eye;  an upside-down image of whatever you are looking at is projected here. 
a)
lens
b)
cornea
c)
pupi
d)
retina
41.

It is the white part of the eye.

a)

Sclera

b)

Retina

c)

Pupil

42.

It is a common vision condition in which you can see distant objects clearly, but objects nearby may be blurry.

a)

Hyperopia or Farsightedness

b)

Myopia or Nearsightedness

43.

It is a common vision condition in which you can see objects near to you clearly, but objects farther away are blurry.

a)

Hyperopia or Farsightedness

b)

Myopia or Nearsightedness

44.

We see objects around us when the objects absorb the light rays falling on it.

a)

True

b)

False

45.

Two objects of different sizes were kept in front of a plane mirror but at different distances as shown. Whose image will be bigger in size?

a)

Object I as it is closer to the mirror

b)

Object II as it is bigger in size

c)

Both will be of same size

46.

A block of white colour is kept on a table. Suppose you are looking at this block through a glass which allows only red light to pass through it. What should be the colour of the block as seen by you using this glass?

a)

Red

b)

white

c)

black

d)

blue

47.

If a capital letter R is seen in an ordinary mirror, what does it look like?

a)

A

b)

B

c)

C

d)

D

48.

Which diagram represents diffuse reflection?

a)

A

b)

B

c)

C

d)

D

49.

You see the reflection of the clock without numbers in your plane mirror. The image formed by the hands of the clock shows the time of 3:30. What is the real time?

a)

3:30

b)

8:30

c)

9:30

d)

10:30

50.

What is the distance of your image from you if you stand 1.5 m in front of a plane mirror?

a)

1.5 m

b)

2.0 m

c)

3.0 m

d)

4.5 m

51.

Zed stands 1.5-m tall in front of a plane mirror. What is the height of his image?

a)

4.5 m

b)

3.0 m

c)

2.0 m

d)

1.5 m

52.
Angles are always measured from the:
a)
Boundary
b)
Normal
c)
Incident Ray
d)
Reflected Ray
53.

Choose the correct mirror image of the given figure (X) from amongst the four alternatives.

a)

1

b)

2

c)

3

d)

4

54.

Choose the correct mirror image of the given figure (X) from amongst the four alternatives.

a)

1

b)

2

c)

3

d)

4

55.

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

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