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Science (Reflection, Refraction and Colours)

Total questions: 38

Worksheet time: 22mins

Name
Class
Date
1.

Reflection is when light...

a)

Bends

b)

Bounces

c)

Absorbs

d)

transmits

2.

Refraction is when light...

a)

Bounces

b)

Transmits

c)

Bends

d)

Absorbs

3.

Why does the straw appear to be bent?

a)

light is reflected

b)

light is absorbed

c)

light is turned

d)

light is refracted

4.

What is the angle of reflection equal to?

a)

The angle of refraction

b)

The angle of incidence

c)

The angle of absorption

d)

The angle of light

5.

What might explain why light travels in a straight line?

a)

If there is nothing to interfere with light waves, they should travel in a straight line.

b)

Light waves will always travel in a straight line, even if they come into contact with another object.

c)

Light waves don't travel in a straight line.

d)

Light waves travel in a straight line because sound waves travel in a straight line.

6.

What is the angle of incidence?

a)

The angle at which light bends in water.

b)

The angle at which light hits a surface.

c)

The angle at which light is absorbed by an object.

d)

The angle at which light bounces off a surface.

7.
According to the Law of reflection, a light ray striking a mirror
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 at the same angle it hits.
8.

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

a)

56o

b)

90o

c)

124o

d)

34o

9.
Light bending as it passes through a rain drop is an example of...
a)
Refraction
b)
Reflection
10.

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

a)

A

b)

B

c)

C

d)

D

11.
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
12.

A leaf is green. What does this tell you about the light that is being absorbed?

a)

The light is a UV ray.

b)

The light is not a part of the light spectrum.

c)

All colors are reflected except green.

d)

All colors are absorbed except green

13.
Which image correctly shows how light would interact with the t-shirt and shorts?
a)
A
b)
B
c)
C
d)
D
14.
We see the color _______ when a material absorbs all visible light.
a)
white
b)
black
15.

The following diagram shows the ray diagram when a torch light is torched towards a mirror. Which of the following is the correct reflected ray?

a)
b)
c)
d)
16.

Which of the following shows that light travels in a straight line? Tick the correct answers.

a)

A

b)

B

c)

C

d)

D

e)

E

17.

Which of the following shows the principle of light refraction? Tick the correct answers.

a)

A

b)

B

c)

D

d)

E

e)

F

18.
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
19.

A student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He can get a correct measure of the angle of incidence and the angle of emergence by following the labelling indicated in figure:

a)

I

b)

II

c)

III

d)

IV

20.

The type of mirror used in reflector in automobile lights is

a)

Plane mirror

b)

Concave mirror

c)

Convex mirror

d)

None of the above

21.
What colours is white light made from?
a)
Orange, Green, Pink, Magenta, Peach, Rose, Lemon
b)
Red, Orange Yellow, Green, Black, Indigo, Violet
c)
Red, Orange, Yellow, Green, Blue, Indigo, Violet
d)
Red, Orange, Yellow, Grey, Blue, Indigo, Violet
22.

Which pair of colours do NOT combine to make the correct secondary colours?

a)

Red + Blue = Magenta

b)

Red + Green = Yellow

c)

Blue + Green = Cyan

d)

blue + Green = Yellow

23.
Which image correctly shows how a blue filter and a green filter produce coloured light?
a)
A
b)
B
24.
In the image on the left we see the clothes of a boy under white light. How would the boys clothes look under green light
a)
A
b)
B
25.

Why is red light is at the top whileviolet at the bottom of the spectrum?

a)

Violet light has the medium speed so it is refracted the least.

b)

Violet light has the highest speed so it is refracted the least

c)

Red light has the slowest speed so it is refracted the least

d)

Red light has the highest speed so it is refracted the least.

26.

We are able to see the moon because it ____________

a)

gives out light

b)

glows

c)

reflects light from the sun

d)

reflects light from the earth

27.
MCQ 08
If a capital letter R is seen in an ordinary mirror, what does it look like?
a)
A
b)
B
c)
C
d)
D
28.
Red objects appear 'red' because:
a)
red objects are made from red materials
b)
red objects absorb red light
c)
red objects absorb all other colour except red light
d)
red objects don't reflect any light
29.

Refraction occurs when light changes its

a)

Speed only

b)

Direction

c)

Speed and direction

d)

Speed and color

30.
What is E?
a)
Angle of incidence
b)
Angle of reflection
c)
Normal
d)
Reflect ray
31.

what are the three primary colours

a)

cyan, magenta, yellow

b)

pink, orange, purple

c)

blue,green, red

d)

yellow, red, blue

32.

red + blue light =

a)

cyan

b)

pink

c)

magenta

d)

blue

33.

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

a)

periscope

b)

hand held mirror

c)

plane mirror

d)

dental mirror

34.

What is the relation between refractive index and the optical density?

a)

More refractive index more is the density.

b)

More refractive index less is the density

c)

Less refractive index more is the density

d)

No relation between refractive index and optical density

35.

How the pond appears to be, when it is seen from outside?

a)

Seems Deeper

b)

Seems shallower

c)

Seems very deep

d)

No change is there

36.

What is the relation between angle of incidence and angle of refraction when light goes from optically rarer to denser

a)

Angle I is equal to angle r

b)

Angle I is greater than angle r

c)

Angle I is less than angle r

d)

No relation between these angles

37.

Which of the following is used as a shaving mirror?

a)

convex

b)

concave

c)

plane

d)

all of the above

38.

Which of the following mirror is used for rear view in vehicles?

a)

convex

b)

concave

c)

plane

d)

all

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