Question 1

The ratio of a photon's energy to its frequency is

Accepted Answer

A) its speed. 
B) its wavelength. 
C) its amplitude. 
D) Planck's constant. 
E) none of the above 
A) its speed. 
B) its wavelength. 
C) its amplitude. 
D) Planck's constant. 
E) none of the above D

Question 2

The phenomenon easily explained only in terms of the particle model of light is

Accepted Answer

A) reflection. 
B) refraction. 
C) photoelectric effect. 
D) diffraction. 
E) none of the above 
A) reflection. 
B) refraction. 
C) photoelectric effect. 
D) diffraction. 
E) none of the above C

Question 3

In Heisenberg's formula, △p △x≥ h, the h symbolizes

Accepted Answer

A) Planck's constant. 
B) an average value of Planck's constant. 
C) the peak value of Planck's constant. 
D) Planck's constant divided by 2π. 
E) none of the above 
A) Planck's constant. 
B) an average value of Planck's constant. 
C) the peak value of Planck's constant. 
D) Planck's constant divided by 2π. 
E) none of the above D

Question 4

Heisenberg's uncertainty principle applies to

Accepted Answer

A) momentum and position. 
B) energy and time. 
C) both of these 
D) neither of these 
A) momentum and position. 
B) energy and time. 
C) both of these 
D) neither of these

Question 5

The idea of complementarity is evident in the

Accepted Answer

A) dual nature of light. 
B) notion of opposites being components of a whole. 
C) yin-yang symbol of Eastern cultures. 
D) all of the above 
E) none of the above 
A) dual nature of light. 
B) notion of opposites being components of a whole. 
C) yin-yang symbol of Eastern cultures. 
D) all of the above 
E) none of the above

Question 6

At the beach you see a friend facing away from you. Keeping quiet you can cause her to turn around by

Accepted Answer

A) staring intently at her back. 
B) tossing small pebbles at her back. 
C) although staring will be less effective, both will affect a turn-around. 
D) none of the above 
A) staring intently at her back. 
B) tossing small pebbles at her back. 
C) although staring will be less effective, both will affect a turn-around. 
D) none of the above

Question 7

When ejected electrons from a photosensitive surface are confined within the material we have a

Accepted Answer

A) photovoltaic cell. 
B) light-emitting diode. 
C) both of these 
D) none of these 
A) photovoltaic cell. 
B) light-emitting diode. 
C) both of these 
D) none of these

Question 8

Which of the following has the longer wavelength?

Accepted Answer

A) a low-energy electron 
B) a high-energy electron 
C) both the same 
D) none of the above 
A) a low-energy electron 
B) a high-energy electron 
C) both the same 
D) none of the above

Question 9

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

Question 10

A radiation detector measures radioactivity decay of a piece of radium by catching and counting alpha particles it emits. Making this measurement affects the

Accepted Answer

A) radiation rate of the piece of radium. 
B) alpha particles that are caught and counted. 
C) both of these 
D) neither of these 
A) radiation rate of the piece of radium. 
B) alpha particles that are caught and counted. 
C) both of these 
D) neither of these

Question 11

In the equation E = hf, the symbol h stands for

Accepted Answer

A) half-life. 
B) momentum as it pertains to light. 
C) energy per photon wavelength. 
D) none of the above 
A) half-life. 
B) momentum as it pertains to light. 
C) energy per photon wavelength. 
D) none of the above

Question 12

When you adjust a telescope to get a clear image of Saturn's rings, in a small but measurable way you alter

Accepted Answer

A) the telescope. 
B) Saturn's rings. 
C) both of these 
D) neither these 
A) the telescope. 
B) Saturn's rings. 
C) both of these 
D) neither these

Question 13

After passing through double slits, electrons make a pattern on a screen that

Accepted Answer

A) shows which slit each electron has passed through. 
B) resembles a pattern that waves make. 
C) has two peaks of intensity. 
D) has a single wide peak of intensity. 
A) shows which slit each electron has passed through. 
B) resembles a pattern that waves make. 
C) has two peaks of intensity. 
D) has a single wide peak of intensity.

Question 14

The photons having greatest energy are those of

Accepted Answer

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

Question 15

In photoelectric emission, the work function is the minimum

Accepted Answer

A) frequency of light to produce emission. 
B) energy required to eject an electron from the surface. 
C) energy an emitted electron possesses. 
D) none of the above 
A) frequency of light to produce emission. 
B) energy required to eject an electron from the surface. 
C) energy an emitted electron possesses. 
D) none of the above

Question 16

If a proton and an electron have the same momentum, the longer wavelength belongs to the

Accepted Answer

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

Question 17

The Heisenberg uncertainty principle states that

Accepted Answer

A) Planck's constant sets a limit on accuracy of measurements. 
B) we can't simultaneously measure exactly both the position and momentum of a particle. 
C) we can't simultaneously measure exactly a particle's energy and time having that energy. 
D) all of the above 
A) Planck's constant sets a limit on accuracy of measurements. 
B) we can't simultaneously measure exactly both the position and momentum of a particle. 
C) we can't simultaneously measure exactly a particle's energy and time having that energy. 
D) all of the above

Question 18

The wave-particle duality applies to

Accepted Answer

A) photons. 
B) electrons. 
C) protons 
D) all of the above 
E) none of the above 
A) photons. 
B) electrons. 
C) protons 
D) all of the above 
E) none of the above

Question 19

When you adjust a telescope to get a clear image of Saturn's rings, there is a perceptible interaction between

Accepted Answer

A) you and the telescope. 
B) you and Saturn's rings. 
C) both of these 
D) neither these 
A) you and the telescope. 
B) you and Saturn's rings. 
C) both of these 
D) neither these

Question 20

A key feature of the theory of chaos is

Accepted Answer

A) unpredictability. 
B) very small initial differences can lead to very large eventual differences. 
C) the randomness of molecular motion makes prediction difficult. 
D) even orderly systems are seen to be disorderly when carefully studied. 
A) unpredictability. 
B) very small initial differences can lead to very large eventual differences. 
C) the randomness of molecular motion makes prediction difficult. 
D) even orderly systems are seen to be disorderly when carefully studied.

Exam 31: Light Quanta

The ratio of a photon's energy to its frequency is

The phenomenon easily explained only in terms of the particle model of light is

In Heisenberg's formula, △p △x≥ h, the h symbolizes

Heisenberg's uncertainty principle applies to

The idea of complementarity is evident in the

At the beach you see a friend facing away from you. Keeping quiet you can cause her to turn around by

When ejected electrons from a photosensitive surface are confined within the material we have a

Which of the following has the longer wavelength?

The more we know about a particle's position, the less we know about its

A radiation detector measures radioactivity decay of a piece of radium by catching and counting alpha particles it emits. Making this measurement affects the

In the equation E = hf, the symbol h stands for

When you adjust a telescope to get a clear image of Saturn's rings, in a small but measurable way you alter

After passing through double slits, electrons make a pattern on a screen that

The photons having greatest energy are those of

In photoelectric emission, the work function is the minimum

If a proton and an electron have the same momentum, the longer wavelength belongs to the

The Heisenberg uncertainty principle states that

The wave-particle duality applies to

When you adjust a telescope to get a clear image of Saturn's rings, there is a perceptible interaction between

A key feature of the theory of chaos is

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