Question 1

Two pulses of light, one red and one blue, have the same energy. The pulse with the greater number of photons is the

Accepted Answer

A) red pulse. 
B) blue pulse. 
C) both the same 
A) red pulse. 
B) blue pulse. 
C) both the same

Question 2

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

Accepted Answer

A) a baseball. 
B) a spitball. 
C) an electron. 
D) none of the above 
A) a baseball. 
B) a spitball. 
C) an electron. 
D) none of the above

Question 3

The photoelectric effect supports a

Accepted Answer

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

Question 4

Taking the work function into account, electrons ejected from a photosensitive material have

Accepted Answer

A) less kinetic energy than the absorbed photon's energy. 
B) more kinetic energy than the absorbed photon's energy. 
C) kinetic energy equal to the absorbed photon's energy. 
A) less kinetic energy than the absorbed photon's energy. 
B) more kinetic energy than the absorbed photon's energy. 
C) kinetic energy equal to the absorbed photon's energy.

Question 5

The greater the frequency of 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 
A) number of ejected electrons. 
B) velocity of ejected electrons. 
C) both of these 
D) neither of these

Question 6

The first to be credited with the idea that energy was quantized was

Accepted Answer

A) Max Planck. 
B) Albert Einstein. 
C) both Planck and Einstein at about the same time. 
A) Max Planck. 
B) Albert Einstein. 
C) both Planck and Einstein at about the same time.

Question 7

The uncertainty principle tells us that the more information one has about the energy of an electron, the less certain one is about

Accepted Answer

A) its position. 
B) the time it has that energy. 
C) both of these 
D) neither of these 
A) its position. 
B) the time it has that energy. 
C) both of these 
D) neither of these

Question 8

Two photons that have the same wavelength also have the same

Accepted Answer

A) frequency. 
B) energy. 
C) both of these 
D) neither of these 
A) frequency. 
B) energy. 
C) both of these 
D) neither of these

Question 9

A quantum of light is called

Accepted Answer

A) a proton. 
B) a neutron. 
C) an electron. 
D) a neutrino. 
E) none of the above 
A) a proton. 
B) a neutron. 
C) an electron. 
D) a neutrino. 
E) none of the above

Question 10

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

Accepted Answer

A) excitation. 
B) efficiency. 
C) energy. 
D) all of the above 
A) excitation. 
B) efficiency. 
C) energy. 
D) all of the above

Question 11

The formula △p △ x≥ h tells us that the product of △p and △x cannot be

Accepted Answer

A) less than h 
B) greater than h 
C) equal to h 
A) less than h 
B) greater than h 
C) equal to h

Question 12

According to your textbook, popular confusion is lessened when applying Heisenberg's uncertainty principle by heeding the distinction between

Accepted Answer

A) momentum and energy. 
B) energy and time. 
C) passive observation and probing. 
A) momentum and energy. 
B) energy and time. 
C) passive observation and probing.

Question 13

A photosensitive surface is illuminated with both blue and violet light. The light that causes the greater number of ejected electrons is

Accepted Answer

A) blue light. 
B) violet light. 
C) both eject equal numbers. 
D) need more information 
A) blue light. 
B) violet light. 
C) both eject equal numbers. 
D) need more information

Question 14

By adjusting a TV image with a remote you can

Accepted Answer

A) affect only the image. 
B) participate with the action on the screen. 
C) both of these 
D) neither of these 
A) affect only the image. 
B) participate with the action on the screen. 
C) both of these 
D) neither of these

Question 15

The ratio of the energy of a photon to its frequency is

Accepted Answer

A) ?. 
B) Planck's constant. 
C) photon speed. 
D) photon wavelength. 
E) unknown. 
A) ?. 
B) Planck's constant. 
C) photon speed. 
D) photon wavelength. 
E) unknown.

Question 16

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

Question 17

Which has more energy per photon?

Accepted Answer

A) red light 
B) blue light 
C) both the same 
A) red light 
B) blue light 
C) both the same

Question 18

The physics underlying photovoltaic solar cells is

Accepted Answer

A) electron diffraction. 
B) photon capture. 
C) the photoelectric effect. 
D) none of the above 
A) electron diffraction. 
B) photon capture. 
C) the photoelectric effect. 
D) none of the above

Question 19

By casually glancing at a scene on your TV you are

Accepted Answer

A) affecting the image. 
B) participating in the action on the screen. 
C) both of these 
D) neither of these 
A) affecting the image. 
B) participating in the action on the screen. 
C) both of these 
D) neither of these

Question 20

In placing a cool thermometer into a hot cup of tea you likely are

Accepted Answer

A) affecting its temperature. 
B) draining energy from the tea. 
C) both of these 
D) neither of these 
A) affecting its temperature. 
B) draining energy from the tea. 
C) both of these 
D) neither of these

Exam 31: Light Quanta

Two pulses of light, one red and one blue, have the same energy. The pulse with the greater number of photons is the

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

The photoelectric effect supports a

Taking the work function into account, electrons ejected from a photosensitive material have

The greater the frequency of the illuminating light on a photosensitive surface, the greater the

The first to be credited with the idea that energy was quantized was

The uncertainty principle tells us that the more information one has about the energy of an electron, the less certain one is about

Two photons that have the same wavelength also have the same

A quantum of light is called

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

The formula △p △ x≥ h tells us that the product of △p and △x cannot be

According to your textbook, popular confusion is lessened when applying Heisenberg's uncertainty principle by heeding the distinction between

A photosensitive surface is illuminated with both blue and violet light. The light that causes the greater number of ejected electrons is

By adjusting a TV image with a remote you can

The ratio of the energy of a photon to its frequency is

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

Which has more energy per photon?

The physics underlying photovoltaic solar cells is

By casually glancing at a scene on your TV you are

In placing a cool thermometer into a hot cup of tea you likely are

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