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Light

Total questions: 59

Worksheet time: 52mins

Name
Class
Date
1.

A basketball is __________.

a)

transparent

b)

translucent

c)

opaque

d)

light source

2.

A tissue is __________.

a)

emit

b)

opaque

c)

transparent

d)

translucent

3.

A dried leaf is __________.

a)

translucent

b)

candle

c)

opaque

d)

transparent

4.
A piece of glass is __________.
a)
light
b)
transparent
c)
translucent
d)
opaque
5.
Which is not a source of light?
a)
lamp
b)
lightning
c)
car headlights
d)
mirror
6.

Which object is opaque?

a)

water

b)

plastic bottle

c)

toy car

d)

air

7.

Which object is transparent?

a)

window

b)

wooden block

c)

truck

d)

orange juice

8.

Which object is translucent?

a)

brick

b)

cooking oil

c)

desk

d)

water

9.

Which object is opaque?

a)

air

b)

elephant

c)

window

d)

water

10.

If an opaque object on the path of light becomes very small, light has a tendency to bend around it and not walk in a straight line

a)

Scattering

b)

Dispersion

c)

Difraction

d)

Reflection

11.

The angle of incidence is equal to angle of reflection

a)

True

b)

False

12.

The angle between Normal and Reflecting surface is....

a)

Zero Degree

b)

90 Degree

c)

180 Degree

d)

45 Degree

13.

Plane mirror gives (a)   Size of the image

14.

Image formed by a plane mirror is always

a)

Virtual and inverted

b)

Real and inverted

c)

Virtual and erect

d)

Real and erect

15.

in a plane is image is not laterally inverted

a)

True

b)

False

16.

A spherical mirror, whose reflecting surface is curved inwards, that is, faces towards the centre of the sphere, is called

a)

Concave mirror

b)

Convex mirror

c)

Half is concave and half is convex mirror

d)

Always Convex mirror

17.

The centre of the reflecting surface of a spherical

mirror is a point called

a)

Cenrtre of Curvature

b)

Pole

c)

Radius of Curvature

d)

Aperture

18.

The diameter of the reflecting

surface of spherical mirror is called

a)

Focal length

b)

Radius of Curvature

c)

Aperture

d)

Pole

19.

Identify the surface

a)

Concave surface

b)

Convex Surface

20.
The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-
a)
absorbed
b)
stopped
c)
reflected
d)
refracted
21.

The bouncing off of light rays from the surface of an object such as a mirror or other shiny surface is called:

a)

mirror

b)

laser

c)

reflection

d)

refraction

22.

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

23.

The angle produced as a source of light bounces off a reflecting surface is called ______.

a)

angle of crookedness

b)

angle of reflection

c)

angle of incidence

d)

angle of bounce

24.

MCQ 02

Why can you see most objects?

a)

A. they emit light

b)

B. light refracts through them

c)

C. light reflects off them

d)

D. they absorb light

25.
Section B1a
Given that the angle of incidence = 30 degrees
a. Draw a ray diagram, labelling clearly the normal, incident ray, angle of incidence, reflected ray and angle of reflection accurately.
Which is the correct diagam? 
a)
A
b)
B
c)
C
d)
D
26.

Which is NOT a source of light?

a)

sun

b)

lightbulb

c)

fire

d)

car

27.

Your light-sensing organ is your

a)

ear

b)

finger

c)

brain

d)

eye

28.

In order to see a picture it must

a)

produce light

b)

reflect light

c)

absorb light

29.

To get the best reflection from a mirror you need

a)

a very shiny surface to reflect lots of light

b)

to stand right in front of it

c)

to shine a bright light on it

d)

it to produce light

30.

MCQ 011

According to the laws of reflection, if i = angle of incidence and r = angle of reflection,

a)

A. i = r

b)

B. i > r

c)

C. r > i

d)

D. i is not equal to r

31.

Which of the following is not a source of light?

a)

A. candle

b)

B. caver’s lamp

c)

C. mirror

d)

D. sun

32.

Law of reflection state that - The angle of incidence is .................. to the angle of reflection.

a)

equal

b)

double

c)

half

33.

What is reflection?

a)

Reflection is the bouncing of light off the surface that it strikes on.

b)

Reflection is the absorbing of light off the surface that it strikes on.

c)

Reflection is the bending of light off the surface that it strikes on.

d)

Reflection is the scattering of light off the surface that it strikes on.

34.

When light bounces back it is _____

a)

Reflected

b)

Refracted

c)

Absorbed

d)

Optical Density

35.

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

a)

A

b)

B

c)

C

d)

D

36.

Which diagram represents specular reflection?

a)

A

b)

B

37.

........... – the angle between the normal and the reflected ray.

a)

Angle of incidence

b)

Angle of reflection

c)

Angle of coincidence

d)

Angle of direction

38.

........... – the angle between the normal and the incident ray.

a)

Angle of incidence

b)

Angle of reflection

c)

Angle of coincidence

d)

Angle of direction

39.

How does light travel

a)

It curves around corners

b)

Really slow

c)

In a straight line

d)

In circles

40.

Which diagram represents diffuse reflection?

a)

A

b)

B

c)

C

d)

D

41.
The imaginary line perpendicular to a reflecting surface is called _____.
a)
crooked line
b)
parallel line
c)
angular line
d)
normal line
42.
Section B1a
Given that the angle of incidence = 30 degrees
a. Draw a ray diagram, labelling clearly the normal, incident ray, angle of incidence, reflected ray and angle of reflection accurately.
Which is the correct diagam? 
a)
A
b)
B
c)
C
d)
D
43.

What does the Earth get from the sun?

a)

Only heat

b)

only light

c)

Both heat and light

44.

Which of these provides the best explanation for why the pencil appears broken?

a)

The pencil absorbs the light rays that hit it.

b)

Water reflects light rays away from the pencil.

c)

Light rays are bent by the water in the glass.

d)

The surface of the water reflects the light rays.

45.

At what point is the laser being reflected?

a)

A

b)

B

c)

C

d)

D

46.

Bouncing of a light ray when it strikes a reflecting surface is called.........

a)

Refraction

b)

Dispersion

c)

Reflection

d)

Diffraction

47.

which of the following is not a property of the image formed by a [lane mirror?

a)

virtual and erect

b)

Object size = image size

c)

object distance = image distance

d)

Real and inverted

48.

Which of the following is a concave mirror?

a)
b)
c)
d)
49.

Four students A, B, C and D performed the experiment to determine the focal length of a concave mirror by obtaining the image of a distant tree on a screen. They measured the distances between the screen and the mirror as shown in the above figure.

The correct way of measuring accurate focal length of the mirror is

a)

A

b)

B

c)

C

d)

D

50.

Convex mirror is also called as

a)

converging mirror

b)

diverging mirror

c)

plane mirror

d)

silver mirror

51.

which of the following ray diagrams is correct for the ray of light incident on a concave mirror as shown in the figure 10.6?

a)

A

b)

B

c)

C

d)

D

52.

The point on the spherical mirror at the middle of the surface is called

a)

focus

b)

centre of curvature

c)

pole

d)

radius of curvature

53.

A convex mirror has a focal length 12 cm. Then its radius of curvature is ........ cm

a)

24

b)

12

c)

6

d)

1.2

54.

The focal length of a plane mirror is ........

a)

infinite

b)

zero

c)

1m

d)

100m

55.

When the object is in between the centre of curvature (C) and focus (F) of a concave mirror, then the position of the image is ...........

a)

At focus

b)

At the centre of curvature

c)

at infinity

d)

beyond the centre of curvature

56.

Which mirror is shown in the figure?

a)

convex mirror

b)

concave mirror

c)

plane mirror

d)

silver mirror

57.

Mirror formula is defined as ........

a)

A

b)

B

c)

C

d)

D

58.

When the object is at infinity, a point sized image is formed at ................ by the convex mirror

a)

focus behind the mirror

b)

focus in front of the mirror

c)

radius of curvature

d)

principal axis

59.

The image formed by a concave mirror when the object is placed between the pole and the focus is ......

a)

virtual, erect and magnified

b)

virtual, erect and diminished

c)

real, inverted and magnified

d)

real, inverted and diminished

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