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Light and Lenses

Total questions: 55

Worksheet time: 30mins

Name
Class
Date
1.

the bending of light

a)

refraction

b)

reflection

c)

absorption

d)

transparent

2.
A _______ breaks white light into colors.
a)
prism
b)
visible spectrum
c)
shadow
d)
lens
3.
When all light can pass through an object, that object is:
a)
translucent
b)
transparent
c)
opaque
d)
reflected
4.
All the colors that you can see make up the:
a)
visible spectrum
b)
light energy
c)
shadow
d)
prism
5.
When light cannot pass through an object, that object is:
a)
transparent
b)
translucent
c)
opaque
d)
a prism
6.
When some light can pass through and some light cannot, that object is:
a)
transparent
b)
translucent
c)
opaque
d)
a prism
7.
Stopping light and holding it in is called:
a)
absorption
b)
reflection
c)
refraction
d)
opaque
8.
White light is made up of:
a)
red, yellow, and blue
b)
no colors
c)
all colors
d)
red, green, and blue
9.
Light travels in ____ lines called waves.
a)
straight
b)
curvy
10.
the bouncing of light
a)
refraction
b)
reflection
c)
absorption
d)
shadow
11.
A ___ lens makes objects appear bigger.
a)
concave
b)
convex
c)
prism
d)
flat
12.
A __ lens makes objects appear smaller and further away.
a)
convex
b)
concave
c)
prism
d)
flat
13.
Which is a manmade source of light?
a)
flashlight
b)
sun
c)
star
d)
fire
14.
Which is a natural source of light?
a)
flashlight
b)
cell phone
c)
lightning
d)
headlights
15.
Why does green grass look green?
a)
It reflects all colors except green.
b)
It absorbs all colors except green.
c)
It only absorbs green.
d)
The colors mix to make green.
16.
Which shows the path light travels to help you see something?
a)
object to lamp to eye
b)
eye to lamp to object
c)
object to eye to lamp
d)
lamp to object to eye
17.
How is a rainbow created?
a)
All colors are reflected off of an object.
b)
White light is refracted through a prism.
c)
White light is reflected off of a mirror.
d)
All colors are absorbed by a prism.
18.
Light will be reflected in many different directions off of a ___ surface.
a)
rough
b)
smooth
c)
flat
d)
mirrored
19.
Which window is opaque?
a)
Window 1
b)
Window 2
c)
Window 3
d)
None
20.
___________ is a from of energy that we can see with our eyes.
a)
shadow
b)
light
c)
energy
d)
reflection 
21.
When light bends through a new medium, what is happening?
a)
reflection
b)
refraction
c)
absorption
d)
translucent
22.
Light rays bend when they go from air to water  because of a change in ___________.
a)
color
b)
wavelength
c)
density
d)
speed
23.
This diagram best represents 
a)
reflection
b)
refraction
c)
absorption
d)
diffusion
24.
Law of reflection state that - The angle of incidence is .................. to the angle of reflection.
a)
equal
b)
double
c)
half
25.
What does the word "converging" mean?
a)
to separate
b)
to come together
c)
parallel 
d)
perpendicular
26.
A converging lens is also known as a ____ lens.
a)
convex
b)
concave
c)
double
d)
refracted
27.
_____ is a lens that is thicker in the middle and makes an object appear bigger.
a)
prism
b)
convex lens
c)
concave lens
d)
mirror
28.
The point where the rays meet is known as....
a)
Fire
b)
the focal point
c)
refraction
d)
Plane of the lens
29.
Which describes a convex lens?
a)
triangular in shape
b)
more transparent in the middle
c)
thicker on the edges than in the middle
d)
thicker in the middle than on the edges
30.
Is a convex lens thicker or thinner in the middle?
a)
Thicker 
b)
Thinner 
31.
Is a concave lens thicker or thinner in the middle? 
a)
Thicker 
b)
Thinner 
32.

When light waves move from passing through air to passing through a glass lens when happens to them?

a)

They slow down and change direction

b)

They speed up and change direction

c)

They maintain the same speed and change direction

d)

They maintain their same speed and direction

33.

How does a concave lens differ from a convex lens?

a)

A convex lens is another way to describe a plane mirror; a concave lens is curved

b)

A concave lens is curved inward on both sides; a convex lens is on only one side

c)

A convex lens has a thick center and thin edges, a concave lens has a thin center and thicker edges

d)

A convex lens has a thin center and thick edges. a concave lens has a thick center and thinner edges

34.
What does the word "diverging" mean?
a)
to spread apart
b)
to come together
c)
parallel
d)
perpendicular
35.

What type of lens do you have in your eye?

a)

Concave

b)

Prismatic

c)

Objective

d)

Convex

36.
A converging lens is also known as a ____ lens.
a)
convex
b)
concave
c)
double
d)
refracted
37.

Light bounces off and object when it is

a)

reflected

b)

absorbed

c)

refracted

d)

transmitted

38.

Light bends when passing through a new substance is called:

a)

refraction

b)

reflection

c)

absorption

39.

When light continues to pass through an object without changing its path

a)

reflect

b)

transmit

c)

absorb

d)

refract

40.

Lenses, like camera lenses, microscopes or magnifying glasses do what?

a)

reflect light

b)

refract light

c)

absorb light

41.

Which letter is an example of reflection?

a)

A

b)

B

c)

C

42.

The bending of waves around a barrier.

a)

refraction

b)

diffraction

c)

resonance

43.
Why can you see most objects? 
a)
they emit light
b)
light refracts through them
c)
light reflects off them
d)
They absorb light
44.
Swimming pools and the ocean look shallower than they really are due to:
a)
reflection 
b)
dispersion
c)
refraction
d)
total internal reflection
45.
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.
46.
A cut piece of clear glass or plastic in the form of a triangle or other geometric shape.
a)
Person
b)
Prison
c)
Prism
d)
Preacher
47.

What is the definition of Refraction?

a)

The bending of waves as they enter a new medium

b)

When two interfering waves have a displacement in the opposite direction, crest and trough overlap. Zero amplitude.

c)

When two interfering waves have a displacement in the same direction, two crests and two troughs overlap. Increased amplitude.

48.

What is the definition reflection?

a)

The bending of waves as they enter a new medium

b)

Bouncing back of waves from a surface that it can’t pass through

c)

The bending of waves as they pass through openings or around corners

d)

When two interfering waves have a displacement in the same direction, two crests and two troughs overlap. Increased amplitude.

49.

what is diffraction

a)

is a soild liquid gass

b)

is a beam of light that is spread out and passes through an object

c)

a beam of light

50.
This image is representing what wave interaction?
a)
Refraction
b)
Diffraction
c)
Reflection
d)
Interference
51.
What is the main difference between refraction and diffraction?
a)
refraction is a phenomenon that affects light; diffraction is a phenomenon that affects sound
b)
refraction involves the bending of light; diffraction involves the bending and spreading of light, usually around an obstacle
52.

What would you call this?

a)

Reflection

b)

Diffraction

c)

Refraction

d)

Friction

53.

What would you call this?

a)

Refraction

b)

Diffraction

c)

Bends

d)

Reflection

54.

witch picture is diffraction

a)
b)
c)
d)
55.

Does the wave speed change after diffraction？Explain it.

a)

Yes. It slows down.

b)

Yes. It speeds up.

c)

No. There is nothing change about the medium.

d)

No. Because the frequency doesn't change.

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