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Unit 12 Light Review

Total questions: 55

Worksheet time: 41mins

Name
Class
Date
1.

A shadow is created by the....

a)

absence of light.

b)

absence of waves.

c)

absence of color.

d)

blocking of sound.

2.

Which images are opaque?

a)

A & C

b)

A,C,E, & F

c)

D, E, & F

d)

A & E

3.

Material that allows light to pass through allowing you to see "clearly" to the other side.

a)

opaque

b)

translucent

c)

transparent

4.

An opaque object...

a)

allows light to pass through

b)

allows some light to pass through

c)

allows no light to pass through

5.

Why does an apple look red?

a)

because it absorbs red light and reflects white light

b)

because it absorbs red light waves and reflects the others

c)

because it absorbs all colors of light

d)

because it reflects red light waves and absorbs the others

6.

White light is made up of all of the colors of the rainbow

a)

True

b)

False

7.

Black absorbs all light.

a)

True

b)

False

8.

What color of light do you get by combining red, green, and blue light?

a)

Black Light

b)

White Light

c)

Ultraviolet Light

d)

Infrared Light

9.

What color is produced when mixing cyan, yellow, and magenta inks (pigments).

a)

White

b)

Black

c)

Blue

d)

Green

10.
Light travels ___________.
a)
backwards
b)
in a straight line
c)
in curves
d)
at a right angle
11.
What do water droplets in a rainbow act like?
a)
reflectors
b)
rays of light
c)
lasers
d)
prisms
12.
By passing light through a prism, you can tell ____________.
a)
that white light is made of different colors
b)
the weight of the prism
c)
the original source of light
d)
that blue light is brighter than white light
13.
What color appears when all colors are absorbed?
a)
black
b)
red
c)
white
d)
violet
14.
What is the correct order of the colors of the rainbow?
a)
Red, Yellow, Orange, Blue, Indigo, Violet
b)
Red, Orange, Yellow, Green, Blue, Indigo, Violet
c)
Yellow, Orange, Red, Green, Blue, Violet, Indigo
15.
Materials such as wood and metal do not let light travel through them. We cannot see them at all. They are said to be ______________.
a)
invisible
b)
opaque
c)
translucent
d)
transparent
16.
Materials that allow light to pass through them clearly are called transparent. Which of the following materials is NOT transparent?
a)
window glass
b)
clean air
c)
a mirror
d)
water
17.
What happens to light when it strikes an opaque surface?
a)
the light passes through with no change
b)
the light is refracted back and separated into colors
c)
the light curves around the opaque surface entirely
d)
the light does not pass through the opaque surface
18.
Which example shows light being reflected?
a)
using a microscope to make small objects look larger
b)
using a prism to show the colors of the spectrum
c)
using eyeglasses to see things better
d)
using a mirror to see your image
19.
When light bounces off a smooth surface, this is known as which of the following?
a)
reflection
b)
refraction
c)
absorption
d)
deflection
20.
Which of the following allows you to see objects that do not produce their own light?
a)
absorption
b)
refraction
c)
reflection
d)
deflection
21.
Bending of light as it passes from one material to another is known as which of the following?
a)
absorption
b)
reflection
c)
refraction
d)
mirror image
22.

A ray of light is incident towards a plane mirror at an angle of 30-degrees with the mirror surface. What will be the angle of reflection?

a)

30°

b)

60°

c)

90°

d)

120°

23.

Which one of the following diagrams depicts diffuse reflection?

a)

A

b)

B

c)

C

d)

D

24.

Which letter represents the angle of incidence?

a)

A

b)

B

c)

C

d)

D

25.

Which picture DOES NOT illustrate regular reflection?

a)
b)
c)
d)
26.

Refers to bouncing back of light when it hits a smooth surface

a)

Reflection

b)

Echo

c)

Refraction

d)

Diffusion

27.

Refer to the diagram drawn on the board. What does a represents?

a)

Incident ray

b)

reflected ray

c)

normal

d)

mirror

28.

The angle of incidence is equal to the angle of reflection

a)

law of light

b)

law of reflection

c)

law of refraction

d)

law of incidence

29.

what is the angle of reflection if the angle of incidence is 300?

a)

100

b)

200

c)

300

d)

600

30.
How does light behave as it enters these mediums?
a)
continue its path as straight line.
b)
bends toward the normal
c)
bends away from the normal
d)
reflects
31.
What is this called?
a)
refraction
b)
reflection
c)
reconstroction
d)
retraction
32.
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.
33.
The fact the two angles are the same is an example of....
a)
Refraction
b)
Angle of Incidence
c)
Law of reflection
d)
Magnification
34.

Light, or “white light”, is made up of all colors of light mixed together.

a)

True

b)

False

35.

If white light is passed through a prism, it can not be separated into light of different colors.

a)

True

b)

False

36.

The colors are red, orange, yellow, green, blue, and violet. These are ALL the colors seen in a rainbow.

a)

True

b)

False

37.

If white light is passed through a prism, it can be separated into the colors are red, orange, yellow, green, blue, indigo and violet.

a)

True

b)

False

38.

The different colors of light revealed when white light is passed through a prism are called the _______.

a)

rainbow

b)

prism

c)

color of white light

d)

Spectrum

39.

Light travels in a straight line away from the light source. But can it travel through transparent material and empty space?

a)

Yes

b)

No

40.

Reflection happens when light bounces back from a surface.

a)

No

b)

Yes

c)

It depends on the object it strikes

d)

Sometimes

41.

Reflection only allows objects to be seen if they produce their own light.

a)

True

b)

False

42.

Reflection allows objects to be seen that do not produce their own light.

a)

True

b)

False

43.

When light strikes a smooth, shiny object, it is ______ so that an image can be seen. For example, a mirror or a pool of water will reflect (bounce back) an image very similar to the object.

a)

Refracted

b)

Reflected

44.

When light is ______ it passes from one type of transparent material to another, and changes direction. For example, when light travels through a magnifying glass, it changes direction, and we see a larger, magnified view of the object.

a)

Refracted

b)

Reflected

45.

When a straw is viewed in water, light passes from the water to the air causing the path of the light to bend. When the light bends, the straw appears distorted (bent or broken).

a)

True

b)

False

c)

It depends on the size of the straw

d)

Only if there is a lot of water in the glass

46.

The colors of objects are determined by the light that is not absorbed but is reflected by the objects.

a)

True

b)

False

47.

The color of the light that is_________ from an object is the color that the object appears. For example, a red object reflects red colors of light and absorbs all other colors.

a)

Refracted

b)

Reflected

48.

The color _____ is seen when all of the colors of light are reflected.

a)

White

b)

Black

49.
Which of these is our MAIN (most important) source of light?
a)
Lightbulbs
b)
The Sun
c)
Fire
d)
All of them
50.
What does it mean to refract?
a)
bounce off
b)
to bend
c)
curve outward
d)
reflect
51.

Red + Blue

a)

Magenta

b)

Yellow

c)

Cyan

52.

Red + Green =

a)

Magenta

b)

Yellow

c)

Cyan

53.

Red + Blue + Green =

a)

White Light

b)

Black

c)

Blue

54.

White Light - Red - Blue - Green =

a)

White Light

b)

Cyan

c)

Magenta

d)

Black Light

55.

Cyan - Green

a)

Blue

b)

Yellow

c)

Red

d)

Magenta

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