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Reflection and Refraction

Total questions: 65

Worksheet time: 1hrs 5mins

Name
Class
Date
1.

What is the phenomenon of sending light back in the same medium called?

a)

Refraction

b)

Dispersion

c)

Reflection

d)

Diffraction

2.

What type of image is formed by the actual intersection of light rays?

a)

Diminished Image

b)

Reflected Image

c)

Virtual Image

d)

Real Image

3.

What type of lens is thicker at the center and thinner at the edges?

a)

Concave Lens

b)

Biconvex Lens

c)

Biconcave Lens

d)

Convex Lens

4.

What does the refractive index represent?

a)

Speed of light in a vacuum

b)

Distance of the object from the lens

c)

Ratio of speeds of light in two media

d)

Angle of incidence

5.

What is the principal focus of a lens?

a)

Point where light rays converge

b)

Center of the lens

c)

Edge of the lens

d)

Point of maximum divergence

6.
A rainbow forms when white light separates into different colors during?
a)
Absorption
b)
Scattering
c)
Refraction
d)
Transmission
7.
The bending of a wave as it passes at an angle from one medium to another is called?
a)
Convex Lens
b)
Refraction
c)
Concave Lens
8.
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.
9.
Is a concave lens thicker or thinner in the middle? 
a)
Thicker 
b)
Thinner 
10.
A converging lens is also known as a ____ lens.
a)
convex
b)
concave
c)
double
d)
refracted
11.
Refraction is the bending of a wave disturbance as it passes from one _________ into another.
a)
glass
b)
medium
c)
area
d)
boundary
12.
When light passes at an angle to the normal from one material into another material in which its speed is higher 
a)
it is bent toward the normal.
b)
it always lies along the normal.
c)
it is unaffected.
d)
it is bent away from the normal.
13.
When light passes at an angle to the normal from one material into another material in which its speed is lower
a)
it is bent towards the normal.
b)
it always lies along the normal.
c)
it is unaffected.
d)
it is bent away from the normal.
14.
What type of an image does a converging lens produce?
a)
real
b)
virtual
c)
real or virtual
d)
none of the above
15.
Which of the following in the diagram is the incident ray?
a)
A
b)
B
c)
C
d)
D
16.

Which of the following in the diagram is the refracted ray?

a)
A
b)
B
c)
C
d)
D
17.

The speed of light in vacuum is _______ m/s

a)

3x108

b)

3x1012

c)

3x106

d)

3x1010

18.

What type of reflection is shown in the image?

a)

Regular reflection

b)

Diffuse reflection

c)

Total internal reflection

19.

Which of the following statements is true about refraction?

a)

Light does not bend as it passes from one medium to another.

b)

Refraction is due to changes in temperature.

c)

Light travels faster in glass than air.

d)

Refraction is due to changes in the speed of light.

20.
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
21.
Light bending as it passes through a rain drop is an example of...
a)
Refraction
b)
Reflection
22.

What do we call a material that light can travel through?

a)

air

b)

water

c)

medium

d)

pathway

23.

What is the name of a line drawn at 900 to the surface of a material?

a)

Boundary

b)

Incident

c)

Normal

d)

Reflected

24.

A light ray meets a plane mirror at 600 . What is the angle of reflection?

a)

60 degrees

b)

30 degrees

c)

120 degrees

d)

180 degress

25.

A light ray passes from air into water at an angle of 300 . Which of these angles is likely to be the angle of refraction?

a)

30 degrees

b)

22 degrees

c)

38 degrees

26.

What happens to the speed of light when it passes from air into glass?

a)

it increases

b)

it does not change

c)

it decreases

27.

When a ray of light from air enters a block of glass at an angle, what change in direction will the ray take?

a)

The ray will move towards the normal

b)

The ray won't move at all

c)

The ray will move away from the normal

28.

What letters indicate angles of incidence?

a)

B and F

b)

A and E

c)

A and P

29.

What letters indicates angles of refraction?

a)

E and U

b)

P and T

c)

B and Q

30.

A ray of light is incident on the surface of water as shown in the diagram. Given that refractive index is 1.33, what would be the angle of refraction.

a)

20 degrees

b)

30 degrees

c)

35 degrees

d)

60 degrees

31.

A light ray is directed at the vertical face of a glass cube. The angle of incidence at the vertical face is 390 and the angle of refraction is 250. What is the refractive index of glass?

a)

1.0

b)

1.3

c)

1.5

d)

2.0

32.

Which diagram correctly shows a ray of light reflected by a plane mirror?

a)

A

b)

B

c)

C

d)

D

33.

Which formula is used to calculate the refractive index,n of the glass?

a)

A

b)

B

c)

C

d)

D

34.

Fiber optic cables work because of the principle of _____.

a)

total internal refraction

b)

incomplete internal refraction

c)

total internal reflection

d)

partial internal reflection

35.

_____ cables transmit beams of light without allowing any of the light to escape until it gets to the end of the cable.

a)

Ethernet

b)

Fiber optic

c)

Armored

d)

Coaxial

36.

When angle of incident (i) equals to critical angle (c) if light is traveled from a denser medium to a less dense medium,

a)

total internal reflection occurs.

b)

angle of refraction is equal to 90 degree.

c)

light is refracted out

d)

light travel in straight line

37.

What happens to light during total internal reflection?

a)

The angle of incidence is greater than the critical angle.

b)

The angle of reflection is the same as the critical angle.

c)

The angle of refraction is less than the critical angle.

d)

The angle of incidence is zero.

38.

An image behind the mirror is...

a)

virtual

b)

real

c)

inverted

d)

upright

39.

This ray diagram is for which mirror?

a)

concave

b)

convex

c)

plane

d)

window

40.
Convex Mirrors produce...
a)
only virtual images
b)
virtual or real images
c)
only real images
d)
inverted images
41.

Real images are :

a)

Always inverted

b)

can be larger or smaller than the object

c)

can be obtained on screen

d)

all the above

42.

The side view mirrors on your car help shrink the image on both sides of the car, allowing you to see a larger field of view. What type of mirror is this?

a)

a convex mirror

b)

a concave mirror

c)

a convex lens

d)

a concave lens

43.

An image that forms when light rays actually meet

a)

virtual image

b)

real image

c)

diffuse reflection

d)

regular reflection

44.
The point in the middle way between a curved mirror and the center of curvature is the
a)
principle point
b)
focal point
c)
center of curvature
d)
principle axis
45.

Virtual images are

a)

always upright

b)

can be obtained on screen

c)

always smaller

46.
Concave mirrors can create virtual and real images.
a)
True
b)
False
47.
Which terms describe the reflection seen in this image?
a)
virtual, upright
b)
virtual, inverted
c)
real, upright
d)
real, inverted
48.

A diverging lens is also known as a ____lens.

a)

refracted

b)

diffracted

c)

convex

d)

concave

49.

Which lens represents the path light takes through a diverging lens?

a)
b)
c)
d)
50.

What type of image is formed?

a)

virtual and inverted

b)

virtual and upright

c)

real and upright

d)

real and inverted

51.

Which ray diagram is correct for convex lens?

a)

b)

c)

d)

52.
What does the word "converging" mean?
a)
to separate
b)
to come together
c)
parallel 
d)
perpendicular
53.
When an object is placed on the focal point in front of a convex lens, the image produced is ___.
a)
real, reduced, and inverted
b)
real, enlarged, and inverted
c)
real, true, and inverted
d)
There is no image
54.
When an object is placed between the focal point and the convex lens, the image produced is ___.
a)
real, reduced, and inverted
b)
real, enlarged, and inverted
c)
virtual, enlarged, and upright
d)
virtual, reduced, and upright
55.
Which of the following is not a primary color of light?
a)
Blue
b)
Red
c)
Yellow
d)
Green
56.
The color of light is determined by _______ of the light waves?
a)
the medium
b)
the frequency
c)
the amplitude
d)
the speed
57.
Light travels
a)
around corners
b)
in a straight line
58.
Why do we see a GREEN leaf?
a)
because humans color it that color
b)
because it absorbs green and reflects all the other colors
c)
it absorbs every color except for green
59.
Why do we see objects as white?
a)
They absorb all light
b)
They reflect all light
c)
They absorb some light and reflect some light
60.

What are the three primary colors of light?

a)

Red,Yellow,Blue

b)

Red,Green,Yellow

c)

Red,Green,Blue

d)

Yellow,Blue,Green

61.

Two polarizing filters are set up so the transmitted light is at a maximum intensity.

Through which angle should polariser 2 be rotated so that no light is transmitted?

a)

45º

b)

60º

c)

90º

d)

180º

62.

Properties of waves are

I. polarization

II. diffraction

III. refraction

Which of these properties apply to sound waves?

a)

I and II

b)

II and III

c)

I and III

d)

All of them

63.

Polarized glasses block __________ light.

a)

horizontal

b)

vertical

64.

Polarized glasses allow __________ light to pass through.

a)

horizontal

b)

vertical

65.

How do polarizing filters allow each eye to see separate images in the projection of 3-d movies?

a)

No one really knows...

b)

Each glasses lens is polarized the same and two polarized images are projected onto the screen

c)

Each glasses lens is polarized 45 degrees from the other and two polarized images are projected onto the screen

d)

Each glasses lens is polarized 90 degrees from the other and two polarized images are projected onto the screen

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