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Optics Lab_Quiz -1

Total questions: 64

Worksheet time: 27mins

Name
Class
Date
1.

diffraction is waves bending because of

a)

edges of a slit or thin object

b)

speed of wave changes

c)

dark matter

d)

gravity

2.

refraction is waves bending because of

a)

edges of a slit or thin object

b)

speed of wave changes

c)

dark matter

d)

gravity

3.

when we look through rainbow glasses... (diffraction-slits)... which color is bent the least (shows up closest to the object)

a)

red

b)

violet

c)

yellow

d)

green

4.

this is an example of

a)

refraction

b)

diffraction

c)

infraction

d)

reflection

5.

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

6.

A wave of constant wavelength diffracts as it passes through an opening in a barrier. As the size of the opening is increased, the diffraction effects

a)

decrease

b)

increase

c)

remain the same

7.
This image is representing what wave interaction?
a)
Refraction
b)
Diffraction
c)
Reflection
d)
Interference
8.

What happens to the frequency of a wave as it passes through a gap？

a)

Increases

b)

Decreases

c)

No change

d)

None of above

9.
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
10.

What would you call this?

a)

Refraction

b)

Diffraction

c)

Bends

d)

Reflection

11.

witch picture is diffraction

a)
b)
c)
d)
12.

Which of the following is the best example of diffraction?

a)

Your voice echoing back when you shout into a canyon

b)

A straw appearing to bend when you place it in a glass of water

c)

A prism breaking a beam of light into its component colors

d)

The music on your stereo getting louder when you turn up the volume

13.

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.

14.

Two waves E and G are shown. The waves have the same speed.

Which statement is correct?

a)

Wave E has a greater amplitude than wave G.

b)

Wave E has a greater intensity than wave G.

c)

Wave E has a smaller frequency than wave G.

d)

Wave E has a smaller wavelength than wave G.

15.

The diagram shows a displacement-time graph for a progressive wave.

a)

Amplitude: 5 mm; Frequency: 40 Hz

b)

Amplitude: 5 mm; Frequency: 50 Hz

c)

Amplitude: 10 mm; Frequency: 40 Hz

d)

Amplitude: 10 mm; Frequency: 50 Hz

16.

Which observation indicates that sound waves are longitudinal?

a)

Sound can be reflected from a solid surface.

b)

Sound cannot be polarised.

c)

Sound is diffracted around corners.

d)

Sound is refracted as it passes from hot air to cold air.

17.

Interference of light is evidence that:

a)

the speed of light is very large

b)

light is a transverse wave

c)

light is electromagnetic in character

d)

light is a wave phenomenon

18.

In a Young's double-slit experiment the centre of a bright fringe occurs wherever waves from the slits differ in the distance they travel by a multiple of:

a)

quarter of a wavelength.

b)

half a wavelength.

c)

a wavelength.

d)

three-fourths of a wavelength.

19.

For destructive interference, the path difference is:

a)

odd number of half wavelengths

b)

even number of half wavelengths

c)

whole number of wavelengths

d)

even whole number of wavelengths

20.

Constructive interference happens when two waves are:

a)

out of phase.

b)

zero amplitude.

c)

in phase.

21.

Two waves with phase difference 180° have resultant of amplitude

a)

one.

b)

zero.

c)

same as the single wave.

d)

doubles the single wave.

22.

Extra distance travelled by one of waves compared with other is called

a)

path.

b)

displacement.

c)

phase difference.

d)

path difference.

23.

What principle is responsible for light spreading as it passes through a narrow slit?

a)

refraction

b)

polarization

c)

diffraction

d)

interference

24.

What principle is responsible for alternating light and dark bands when light passes through two or more narrow slits?

a)

refraction

b)

polarization

c)

diffraction

d)

interference

25.

When a light wave enters into a medium of different optical density,

a)

its speed and frequency change.

b)

its speed and wavelength change.

c)

its frequency and wavelength change.

d)

its speed, frequency, and wavelength change.

26.

Light of wavelength 575 nm falls on a double-slit and the third order bright fringe is seen at an angle of 6.5o. What is the separation between the double slits?

a)

5.0 micro-m

b)

10 micro-m

c)

15 micro-m

d)

20 micro-m

27.

Two light sources are said to be coherent if they

a)

are of the same frequency.

b)

are of the same frequency, and maintain a constant phase difference.

c)

are of the same amplitude, and maintain a constant phase difference.

d)

are of the same frequency and amplitude.

28.

A beam of light bends when it passes from air into water, and then bends even more when it passes from water into glass. What can you conclude from this fact?

a)

Air is denser than glass.

b)

Water is denser than glass.

c)

Glass is denser than water.

d)

Air is denser than water.

29.

What type of stuff can be refracted? Choose the best answer.

a)

Light

b)

Sound

c)

Heat

d)

Anything that travels in waves

30.

Light refracts when:

a)

It changes speed

b)

It changes from a particle to a wave

c)

Its density changes

d)

It encounters a solid object

31.

Why does white light from the sun form a colorful rainbow when it passes through water droplets in the atmosphere?

a)

The droplets of water in the air have different densities

b)

Different-sized water droplets refract white light at different angles

c)

The colors that make up white light refract at different angles

d)

White light diffracts when it encounters water

32.

Diffraction is useful in which of the following fields?

a)

Calculus

b)

Anthropology

c)

Astronomy

d)

Astrology

33.

What's an easy way to create an interference pattern of waves?

a)

Shine a light onto a black surface; the dark color will interfere with the transmission of light

b)

Broadcast radio waves from a tower; water particles in the atmosphere will interfere with the transmission

c)

Play music through a board with one hole in it; the board will interfere with the sound waves

d)

Toss two pebbles into the water close to each other; the waves from each pebble will interfere with the other

34.

What can you conclude about X-rays from the fact that they diffract?

a)

They travel fairly slowly

b)

They cannot pass through most obstacles

c)

They travel in waves

d)

They carry a lot of energy

35.

Blue light bends more than red light when it passes through glass. Thus, blue light has a greater:

a)

Angle of refraction

b)

Interference pattern

c)

Index of diffraction

d)

Wavelength

36.

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.

c)

Refraction usually happens in the atmosphere; diffraction usually happens closer to the earth's surface.

d)

Refraction involves changes to the density of light; diffraction involves changes to the speed of light.

37.

Light waves and sound waves are similar in that...

a)

They are both longitudinal waves

b)

They are both transverse waves

c)

They both transmit energy

d)

They both can travel through space.

38.

A wave of constant wavelength diffracts as it passes through an opening in a barrier. As the size of the opening is increased, the diffraction effects

a)

decrease

b)

increase

c)

remain the same

39.

The diagram shows a series of wave fronts approaching an opening in a barrier. Point P is located on the opposite side of the barrier. The wave fronts reach point P as a result of

a)

resonance

b)

refraction

c)

reflection

d)

diffraction

40.

Which wave phenomenon makes it possible for a player to hear sound from a referee's whistle in an open field even when standing behind the referee?

a)

diffraction

b)

Doppler effect

c)

reflection

d)

refraction

41.

A wave is diffracted as it passes through an opening in a barrier. The amount of diffraction that the wave undergoes depends on both the

a)

amplitude and frequency of the incident wave

b)

wavelength and speed of the incident wave

c)

wavelength of the incident wave and the size of the opening

d)

amplitude of the incident wave and the size of the opening

42.

Which diagram best represents the shape and direction of a series of wave fronts after they have passed through a small opening in a barrier?

a)
b)
c)
d)
43.

Parallel wave fronts incident on an opening in a barrier are diffracted. For which combination of wavelength and size of opening will diffraction effects be greatest?

a)

short wavelength and narrow opening

b)

short wavelength and wide opening

c)

long wavelength and narrow opening

d)

long wavelength and wide opening

44.

Radio waves diffract around buildings more than light waves do because, compared to light waves, radio waves

a)

move faster

b)

move slower

c)

have a higher frequency

d)

have a longer wavelength

45.

Waves pass through a 10-centimeter opening in a barrier without being diffracted. This observation provides evidence that the wavelength of the waves i

a)

much shorter than 10 cm

b)

equal to 10 cm

c)

longer than 10 cm but shorter than 20 cm

d)

longer than 20 cm

46.

The spreading of a wave into the region behind an obstruction is called

a)

diffraction

b)

absorption

c)

reflection

d)

refraction

47.

This diagram shows a series of straight wave fronts produced in a shallow tank of water approaching a small opening in a barrier.

a)
b)
c)
d)
48.
A change in the direction of a wave when the wave finds an obstacle or an edge.
a)
A. refraction
b)
B. reflection
c)
C. standing wave
d)
D. diffraction
49.
A wave can make a leaf bob up and down on the water, but it cannot move the leaf toward the shore. This is because waves only transfer
a)
A. matter.    
b)
B. energy.     
c)
C. media.  
d)
D. crests.
50.

Which of the phenomena suggests that light may be a transverse wave?

a)

Interference

b)

Diffraction

c)

Reflection

d)

Polarization

51.

What happen if ordinary unpolarized light passed through a uniaxial crystal?

a)

Light remains unaffected.

b)

The light is split into two rays.

c)

The light is split into more than two rays.

d)

None of these

52.

What happen if o-ray and e-ray travel along the optic axis?

a)

Both rays travel with the same speed.

b)

o-ray travel faster than e-ray.

c)

e-ray travel faster than o-ray.

d)

none of these

53.

How much phase change is introduced by a quarter wave plate between ordinary and extraordinary rays ?

a)

π2\frac{\pi}{2}

b)

π\pi

c)

π4\frac{\pi}{4}

d)

00

54.

The plane in which electric field vector of plane polarised light vibrates is known as

a)

Plane of vibration

b)

Plane of polarisation

c)

Principle plane

d)

none of these

55.

The acute angle of principle section of calcite crystal is

a)

710

b)

680

c)

1090

d)

1020

56.

Canada Balsam acts as ...... medium for o-ray

a)

Rarer

b)

Denser

57.

Which phenomenon is used in Nicol prism to eliminate o-ray.

a)

Total internal reflection

b)

Double Refraction

c)

Refraction

d)

Polarisation

58.

In negative uniaxial crystal the sphere lies inside the ellipsoid.

a)

True

b)

False

59.

In positive uniaxial crystal o-ray travels faster than e-ray.

a)

True

b)

False

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.

A polarizer is used to:

a)

reduce intensity of light

b)

produce polarized light

c)

increase intensity of light

d)

produce unpolarized light

63.

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

a)

0%

b)

50%

c)

75%

d)

100%

64.

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

a)

0%

b)

50%

c)

75%

d)

100%

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