Question 1

According to the uncertainty principle,the more we know about a particle's position,the less we know about its

Accepted Answer

A)  speed.
B)  momentum.
C)  kinetic energy.
D)  all of these
E)  none of these

Question 2

A quantum of light is called a(n)

Accepted Answer

A)  proton.
B)  neutron.
C)  electron.
D)  notron.
E)  none of these

Question 3

The photoelectric effect best demonstrates the

Accepted Answer

A)  wave nature of light.
B)  particle nature of light.
C)  both of these
D)  none of these

Question 4

In the photoelectric effect,the greater the frequency of the illuminating light,the greater the

Accepted Answer

A)  number of ejected electrons.
B)  maximum velocity of ejected electrons.
C)  both of these
D)  neither of these

Question 5

Which of the following photons has the greatest energy?

Accepted Answer

A)  infrared
B)  red light
C)  green light
D)  blue light
E)  ultraviolet E

Question 6

Which has more energy per photon?

Accepted Answer

A)  red light
B)  blue light
C)  Both have the same energy. B

Question 7

Quantum uncertainties are most predominant for simultaneously measuring the speed and location of

Accepted Answer

A)  a baseball.
B)  a spitball.
C)  an electron.

Question 8

A bullet and a proton have the same momentum.Which has the longer wavelength?

Accepted Answer

A)  the bullet
B)  the proton
C)  Both have the same wavelength.

Question 9

Light behaves primarily as a wave when it

Accepted Answer

A)  travels from one place to another.
B)  interacts with matter.

Question 10

A lump of energy associated with light is called a

Accepted Answer

A)  quantum.
B)  photon.
C)  both of these
D)  neither of these

Question 11

According to quantum physics,measuring the velocity of a tiny particle with an electromagnet

Accepted Answer

A)  affects the velocity of the particle.
B)  has no effect on the velocity of the particle.

Question 12

Which experiment best demonstrates the particle-like nature of light?

Accepted Answer

A)  photoelectric effect
B)  double-slit experiment
C)  neither

Question 13

In the photoelectric effect,the brighter the illuminating light on a photosensitive surface,the greater the

Accepted Answer

A)  number of ejected electrons.
B)  velocity of ejected electrons.
C)  both of these
D)  neither of these

Question 14

According to the correspondence principle,a new theory is valid if it

Accepted Answer

A)  overlaps and agrees where the old theory works.
B)  accounts for confirmed results from the old theory.
C)  predicts the same correct results as the old theory.
D)  all of these
E)  none of these

Question 15

If a proton and an electron have identical momenta,the longer wavelength belongs to the

Accepted Answer

A)  proton.
B)  electron.
C)  both the same C

Question 16

An electron and a baseball move at the same speed.Which has the longer wavelength?

Accepted Answer

A)  the electron
B)  the baseball
C)  Both have the same wavelength.

Question 17

An electron and a proton are traveling at the same speed.Which has the longer wavelength?

Accepted Answer

A)  the electron
B)  the proton
C)  Both have the same wavelength.

Question 18

According to quantum physics,measuring the temperature of lava from a distant volcano by photographing its color with a telescopic camera

Accepted Answer

A)  affects the temperature of the lava.
B)  has no effect on the temperature of the lava.

Question 19

According to quantum physics,looking at a star through a telescope

Accepted Answer

A)  affects the processes occurring in the star.
B)  has no effect on the processes occurring in the star.

Question 20

The uncertainty principle applies not only to momentum and position,but also to energy and time.This statement is

Accepted Answer

A) True 
 B)False

Exam 31: Light Quanta

According to the uncertainty principle,the more we know about a particle's position,the less we know about its

Correct AnswerverifiedShow Answer

A quantum of light is called a(n)

Correct AnswerverifiedShow Answer

The photoelectric effect best demonstrates the

Correct AnswerverifiedShow Answer

In the photoelectric effect,the greater the frequency of the illuminating light,the greater the

Correct AnswerverifiedShow Answer

Which of the following photons has the greatest energy?

Correct AnswerverifiedE

Which has more energy per photon?

Correct AnswerverifiedB

Quantum uncertainties are most predominant for simultaneously measuring the speed and location of

Correct AnswerverifiedShow Answer

A bullet and a proton have the same momentum.Which has the longer wavelength?

Correct AnswerverifiedShow Answer

Light behaves primarily as a wave when it

Correct AnswerverifiedShow Answer

A lump of energy associated with light is called a

Correct AnswerverifiedShow Answer

According to quantum physics,measuring the velocity of a tiny particle with an electromagnet

Correct AnswerverifiedShow Answer

Which experiment best demonstrates the particle-like nature of light?

Correct AnswerverifiedShow Answer

In the photoelectric effect,the brighter the illuminating light on a photosensitive surface,the greater the

Correct AnswerverifiedShow Answer

According to the correspondence principle,a new theory is valid if it

Correct AnswerverifiedShow Answer

If a proton and an electron have identical momenta,the longer wavelength belongs to the

Correct AnswerverifiedC

An electron and a baseball move at the same speed.Which has the longer wavelength?

Correct AnswerverifiedShow Answer

An electron and a proton are traveling at the same speed.Which has the longer wavelength?

Correct AnswerverifiedShow Answer

According to quantum physics,measuring the temperature of lava from a distant volcano by photographing its color with a telescopic camera

Correct AnswerverifiedShow Answer

According to quantum physics,looking at a star through a telescope

Correct AnswerverifiedShow Answer

The uncertainty principle applies not only to momentum and position,but also to energy and time.This statement is

Correct AnswerverifiedShow Answer

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E

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B

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C

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