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Review Optics

Total questions: 75

Worksheet time: 50mins

Name
Class
Date
1.

How does light travel?

a)

light does not travel

b)

in a straight line until it hits an object

c)

light travels slow

d)

light travels in zigzag

2.

What will happen if light waves bounced off the surface of an object?

a)

it will be absorbed

b)

it will be reflected

c)

it will be refracted

d)

it will be diffused

3.

Which objects reflect light energy?

a)

lens

b)

shiny metals and mirrors

c)

cotton

d)

wood

4.

___________ is a form of energy that we can see with our eyes.

a)

image

b)

reflection

c)

light

d)

waves

5.

An image can be seen in a shiny surface when light is ___________.

a)

refracted

b)

reflected

c)

absorbed

d)

diffused

6.

___________ pass through certain materials like different kinds of lenses.

a)

sound waves

b)

heat

c)

conductor

d)

light waves

7.

Refraction is the ___________ of light as it travels from one type of material to another.

a)

absorbing

b)

scattering

c)

bending

d)

diffusing

8.

The pencil looked __________ when submerged in a glass of water.

a)

the same

b)

bent/broken

c)

smaller

d)

bigger

9.

A lens _________ light.

a)

absorbs

b)

reflects

c)

blocks

d)

refracts

10.

The light travels _________ in the water and the glass than in the air.

a)

faster

b)

slower

c)

denser

d)

quicker

11.

The Angle between the incident ray and the normal line is known as the __

a)

angle of incidence

b)

angle of reflection

c)

normal line

12.

The Angle between the reflected ray and the normal line is known as the __

a)

Angle of Incidence

b)

Angle of Reflection

c)

Normal Line

13.

An imaginary line that can be drawn perpendicular to the surface of the mirror at the point of incidence where the ray strikes the mirror.

a)

Incident Ray

b)

Reflected Ray

c)

Normal Line

14.

It is the bouncing off of light rays when it hits smooth or rough surfaces like plane mirrors, paper, concrete walls, etc.

a)

Reflection

b)

Refraction

c)

Dispersion

d)

Diffraction

15.

This is a reflection of light on smooth surfaces such as mirrors or a calm body of water.

a)

Regular

b)

Irregular

c)

Diffused

16.

This is a reflection of light on rough surfaces such as clothing, paper, wavy water, and the asphalt roadway.

a)

Regular

b)

Specular

c)

Irregular or Diffused

17.

What relationship exists between the number of images formed and the angle between two mirrors?

a)

As the Angle between two mirrors decrease, the number of images also decrease.

b)

As the Angle between two mirrors decrease, the number of images increase.

c)

As the Angle between two mirrors increase, the number of images also increase.

18.

What is the correct formula in determining the number of images between two plane mirrors?

a)

N= 1- (360/angle between mirrors)

b)

N= (360/90o) -1

c)

N= (360/angle between mirrors) -1

d)

N= (180/angle between mirrors) -1

19.

This optical instrument allows sea navigators in a submarine to see the surface of the water.

a)

Periscope

b)

Telescope

c)

Microscope

d)

Camera

20.

Why can’t you see your face on the pages of your lecture notebook? When light hits paper,

a)

the waves are reflected in only one direction.

b)

the waves are reflected in all directions.

c)

. the waves are refracted.

d)

the waves are dispersed.

21.
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
22.
Light bending as it passes from one medium (object) to another is...
a)
Refraction
b)
Reflection
23.
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
24.
What is this image showing?
a)
Reflection
b)
Refraction
c)
The law of reflection
d)
Concave Mirror
25.
Why does the lower part of the child appear so much different in size from the upper part?
a)
The light rays that travel through water and then into air are refracted.
b)
The light rays that travel through water and then into air are enlarged.
c)
The light rays that travel through air and then into water are reflected.
d)
The light rays that travel through air and then into water are reduced.
26.

Refraction is when light__________.

a)

Is bounced by an object or material.

b)

Changes speed as it travels in different materials which causes bending.

c)

When light speeds up to over 300,000 km/s

27.

Light emerging from water to air will bend ______ due to the change of speed as it crosses the boundary.

a)

toward the normal

b)

away from the normal

c)

along the normal

28.

Light travels through air, water, glass and many other materials. What path does it travel to get from one place to another?

a)

sideways

b)

back and forth

c)

straight

d)

up and down

29.
Light changes speed as it travels through various mediums.  What are examples of mediums that light can travel through.
a)
snow and ice
b)
air and water
c)
cloth and wood
d)
glass and wood
30.
The pictures shows what a student observed when he looked through a hand lens at a penny.
What happens to light passing through a hand lens that makes the image of the penny appear larger? The light is-
a)
absorbed
b)
reflected
c)
refracted
d)
stopped
31.

The unit of measuring luminous intensity

a)

lumens

b)

candela

c)

lux

32.

A material that can transmit light waves.

a)

opaque

b)

transparent

c)

translucent

33.

The bending of light as it travels from one medium to another medium of different densities.

a)

reflection

b)

refraction

c)

interference

d)

diffraction

34.

The spreading of light as it enters the opening of a barrier.

a)

reflection

b)

refraction

c)

interference

d)

diffraction

35.

The process of separating the colors of white light using a prism.

a)

reflection

b)

interference

c)

dispersion

d)

diffraction

36.

The third color of white light if they are arranged from longest to shortest wavelength.

a)

blue

b)

green

c)

yellow

d)

indigo

37.

The third color of white light if they are arranged from shortest to longest wavelength.

a)

yellow

b)

blue

c)

green

d)

orange

38.

The resulting color of light when blue is mix with green.

a)

magenta

b)

yellow

c)

cyan

d)

orange

39.

The turning back of light upon hitting a barrier or an obstacle.

a)

refraction

b)

diffraction

c)

reflection

d)

interference

40.

The color of an object is the color/s of white light being ________________by the object.

a)

absorbed

b)

reflected

c)

transmitted

41.

What happens to the speed of light when a pencil placed in a glass of water appears broken at the surface of the water?

a)

it stops

b)

it is decreasing

c)

it is increasing

d)

t does not change

42.

Which of the following is an example of an illuminated object?

a)

moon

b)

light bulb

c)

fireflies

d)

stars

43.

What does the law of reflection say?

a)

The angle of incidence equals the angle of reflection.

b)

All waves incident on a mirror are reflected.

c)

Waves incident on a mirror are partially reflected.

d)

The angle a ray is reflected from a mirror is random.

44.

Which of the following describes the image formed by a plane mirror?

a)

real, upright, same size as the object

b)

real, inverted, and reduced

c)

virtual, upright, & same size as the object

d)

virtual, inverted and enlarged

45.

What causes refraction?

a)

bending

b)

displacement of images

c)

different wave speed

d)

diffused reflection

46.
This is an example of a __________ mirror.
a)
Concave
b)
Convex
c)
Plane
d)
Magnifying
47.
The point where the rays meet is known as....
a)
Fire
b)
the focal point
c)
refraction
d)
Plane of the lens
48.
This is an example of a _____________ mirror
a)
Concave
b)
Convex
c)
Plane
d)
Magnifying
49.
This image is.....
a)
inverted and smaller
b)
inverted and larger
c)
not inverted and smaller
d)
not inverted and larger
50.
This image is...
a)
Inverted and smaller
b)
inverted and bigger
c)
not inverted and smaller
d)
not inverted and bigger
51.
This image is...
a)
Inverted and smaller
b)
Inverted and larger
c)
not inverted and smaller
d)
not inverted and larger
52.
The following is a picture of what type of mirror? 
a)
Convex Mirror
b)
Concave Mirror
c)
Plane Mirror
d)
Flat Mirror
53.
The following is a picture of what type of mirror? 
a)
Convex Mirror
b)
Concave Mirror
c)
Plane Mirror
d)
Flat Mirror
54.
An image that you can see , but does not really exist is called which of the following?
a)
Real Image
b)
Fake Image
c)
Virtual Image
d)
Digital Image
55.
Convex Mirrors produce...
a)
only virtual images
b)
virtual or real images
c)
only real images
d)
inverted images
56.
An incident ray that is parallel to the principal axis...
a)
will reflect parallel to the principal axis
b)
will refract through the focal point
c)
will reflect through the center of curvature
d)
will continue along the same path through the lens
57.
a real image...
a)
is produced by virtual rays and can be projected on a screen
b)
is produced by real rays and cannot be projected on a screen
c)
is produced by virtual images and cannot be projected on a screen
d)
is produced by real rays and can be projected on a screen
58.
What is Nearsightedness? 
a)
condition that has difficulty seeing things that are close 
b)
condition that has difficulty seeing things that are far away
59.
What is an Astigmatism?
a)
a very contagious condition caused by a bacterial infection 
b)
a substance that hardens your teeth 
c)
 a hard substance that gives nails their strength 
d)
persons vision is distorted due to a irregular shaped eye 
60.

The production of light with a specific pattern of oscillation.

a)

reflection

b)

polarization

c)

refraction

d)

diffraction

61.

A Polarizing filter is used to reduce glare on reflective surfaces including glass, windows, and water.

a)

True

b)

False

62.

Approximately how much light is blocked by two polarizing filters that are perpendicular to each other?

a)

0%

b)

50%

c)

75%

d)

100%

63.

Approximately how much light is blocked by a single polarizing filter?

a)

0%

b)

50%

c)

75%

d)

100%

64.

Polarized light of intensity I0 is incident on a polarising filter. The angle between the plane of polarisation of the incident light and the transmission plane of the polariser is θ. Which graph shows how the intensity I of the light transmitted through the polariser varies with θ?

a)

A

b)

B

c)

C

d)

D

65.

If the polarizing axis of the second filter is parallel to

that of the first, the light will .............

a)

pass through it

b)

block

c)

reflect

66.

•An initially unpolarized light of intensity Io is incident to a polarizer. The transmitted light then goes through an analyzer that makes a 30 angle with the axis of the initial polarizer. In terms of Io, what is the intensity of the light transmitted through the analyzer?

a)

0 Io

b)

0.33 Io

c)

0.5 Io

d)

0.375 Io

67.

A student stands 10 feet away from a light bulb. The student walks toward the light bulb to a 5 feet distance. Which is true? Intensity = 1 / d2

a)

The bulb appears 2x's brighter

b)

The bulb appears 4x's brighter

c)

The bulb appears 5x's brighter

d)

The bulb appears 25x's brighter

68.

Polarized light travels to a polarizer whose transmission axis makes an angle of 25°25\degree . Calculate the fraction of incident light intensity that gets transmitted through the polarizer. 

a)

82%

b)

41%

c)

91%

d)

18%

69.

Light shines through a hole into a box and come out the other side with ~38% of the initial intensity. You know there are only two polarizers in the box. Which of the following is the closest angle difference between the two polarizers?

a)

30°30\degree

b)

90°90\degree  

c)

40°40\degree  

d)

45°45\degree  

70.
A ray of light traveling from air into crown glass strikes the surface at an angle of 30 degrees. What is the angle of refraction? (air n=1, crown glass n=1.532)
a)
39.7 degrees
b)
19.2 degrees
c)
59.1 degrees
d)
12.3 degrees
71.
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.
72.
Glass has a _____________ index of refraction than air.
a)
Equal
b)
Greater
c)
Less
d)
Impossible to say
73.
The fact the two angles are the same is an example of....
a)
Refraction
b)
Angle of Incidence
c)
Law of reflection
d)
Magnification
74.
The measure of how much light refracts is called...
a)
Refraction
b)
Law of reflection
c)
reflected ray
d)
Index of refraction
75.
The velocity of light in vacuum is _______ m/s.
a)
3x108
b)
3x1012
c)
3x106
d)
3x1010

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