AnswersCrowley Credit Recovery Physics BWave Interactions

Dual Nature of Light Answers

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1
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What is the smallest packet of electromagnetic energy that can be absorbed or emitted?

A
a proton
B
an electron
C
a photon
D
a wave
2
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The photoelectric effect occurs when are emitted from metal when the metal is struck by light of certain frequencies.

Answer not available
3

Which phenomena support only the particle theory of light? Select 2 options.

A
reflection
B
bending around objects
C
traveling in a straight path
D
interference
E
photoelectric effect
4

Which phenomena support only the wave theory of light? Select 2 options.reflectionrefractiondiffractioninterferencephotoelectric effect

A
reflection
B
refraction
C
diffraction
D
interference
E
photoelectric effect
5

Which of the following would most benefit from quantum computing?

A
animating cartoons
B
running a cash register
C
protecting a device from a cyberattack
D
determining the colors found in a rainbow
6

What is the energy of a photon with a frequency of 3.6 × 1015 Hz? Planck’s constant is 6.63 × 10–34 J•s.

A
1.8 × 10–49 J
B
2.4 × 10–19 J
C
1.8 × 10–18 J
D
2.4 × 10–18 J
7

Which describes the results of the double slit experiment? Select 2 options.

A
Waves produced a diffraction pattern.
B
Results supported the wave theory of light.
C
Results demonstrated the relationship between electric and magnetic fields.
D
Beams of light separated as they passed through a prism.
E
Results supported the particle theory of light.
8

Wilam made a chart to summarize the results of experiments with the photoelectric effect.

Question illustration
A
The first result should state that frequencies of light that were lower than the frequency threshold of the metal could not eject electrons.
B
The first result should state that frequencies of light that were lower than the frequency threshold of the metal could not eject electrons.
C
The second result should state that as soon as light struck the metal, protons were ejected.
D
The second result should state that as soon as light struck the metal, protons were ejected.
E
The second result should state that just before light struck the metal, electrons were ejected.
F
The second result should state that just before light struck the metal, electrons were ejected.
G
The third result should state that the kinetic energy of the ejected electrons depends only on the frequency of the photons.
H
The third result should state that the kinetic energy of the ejected electrons depends only on the frequency of the photons.
9

Which describes a relationship when calculating the energy of a photon?

A
The energy of the photon is directly proportional to frequency.
B
The energy of the photon is inversely proportional to frequency.
C
As the energy of the photon increases, Planck’s constant increases.
D
As the energy of the photon increases, Planck’s constant decreases.
10

What is the formula for calculating the energy of a photon?

A
E = h – f
B
E =
Option B
C
E = h + f
D
E = hf
11

The chart shows the frequencies of certain colors of visible light.

Question illustration
A
violet and green
B
red and orange
C
violet only
D
red, violet, green, and orange
12

Which observation supports the idea that light is made of particles?

A
Light is produced by the interaction of magnetic and electric fields.
B
Light spreads out after passing through an opening.
C
Light diffracts when it hits a barrier.
D
Light moves in a straight path.
13

What is the energy of a photon with a frequency of 2.2 × 1016 Hz? Planck’s constant is 6.63 × 10–34 J•s.

A
1.5 × 10–17 J
B
8.8 × 10–17 J
C
1.5 × 10–16 J
D
8.8 × 10–16 J
14

As part of the photoelectric effect, which of these is responsible for the pixels in an image on a digital camera?

A
accumulated electrons that are absorbed by the image sensor
B
accumulated electrons that are ejected by the image sensor
C
accumulated photons that are ejected by the image sensor
D
accumulated photons that are absorbed by the image sensor
15

A photon has 3.4 × 10–18 joules of energy. Planck’s constant is 6.63 × 10–34 J•s.

A
5.12 × 10–15 Hz
B
1.95 × 1016 Hz
C
5.12 × 1015 Hz
D
1.95 × 10–16 Hz
16

Heinrich Hertz used properties of which type of wave to support the idea that light is also made of waves?

A
infrared
B
gamma
C
microwave
D
radio
17

How does refraction support the particle theory of light?

A
Particles bounce off surfaces similar to the way in which a ball bounces off a wall.
B
Light slows down and bends when it moves from a less dense to a more dense medium.
C
Forces act on the particles to push or pull them from one medium to another.
D
As light passes through an opening, it spreads out in all directions.
18

One quantum particle is in the same position as another quantum particle. Which of the following principles is this an example of?

A
principle of uncertainty
B
principle of superposition
C
principle of the duality of light
D
principle of the polarization of waves

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