A nocturnal bird's eye can to detect monochromatic light of frequency 6.38 * 1014 Hz with a power as small as 2.1 * 10-17 W.What is the corresponding number of photons per second a nocturnal bird's eye can detect?

A) 30 B) 40 C) 50 D) 60 E) 70 A) 30 B) 40 C) 50 D) 60 E) 70

Exam 36: Quantum Physics

During the photoelectric effect,that forms the basis of photovoltaic solar cells,a beam of monochromatic light consisting of an unknown number of photons knock electrons out of a metal producing an electrical current.For this effect,which statement is always true?

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(Multiple Choice)

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Question 1

Correct Answer:

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Given the work function of sodium is 2.75 eV,what is the stopping potential in an experiment using sodium cathodes at 360 nm?

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(Multiple Choice)

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Question 2

Correct Answer:

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Assume all the power consumed by a 75 W light bulb is emitted by the filament,which you can treat as a black-body.Treat the filament as a cylinder of diameter 1.0 mm and length 1.5 cm.What is the temperature of the filament?

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(Multiple Choice)

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Question 3

Correct Answer:

Verified

A nocturnal bird's eye can to detect monochromatic light of frequency 6.38 * 10¹⁴ Hz with a power as small as 2.1 * 10^-17 W.What is the corresponding number of photons per second a nocturnal bird's eye can detect?

(Multiple Choice)

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Question 4

What is the wavelength of an electron which is accelerated from rest through a potential difference of 10^-5 V?

(Multiple Choice)

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Question 5

What is the minimum wavelength of light which can cause electron emission from copper?

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Question 6

Nitrogen molecules of mass,m = 4.648 * 10^-26 kg each,have a speed of 270 m/s and are incident on a double slit.How far apart are the double slits if a nitrogen molecule fringe pattern,with fringes 0.40 cm apart,is observed on a screen 60.0 cm in front of the slits.

(Multiple Choice)

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Question 7

A nitrogen molecule of mass,m = 4.648 * 10^-26 kg,has a deBroglie wavelength of 6.19 * 10^-11 m.Determine its its speed.

(Multiple Choice)

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Question 8

An electron is travelling at 0.7c.What is the deBroglie wavelength of this electron?

(Multiple Choice)

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Question 9

A 71-kg sprinter runs at a speed of 12.1 m/s.What is the minimum uncertainty in his position?

(Multiple Choice)

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Question 10

A soldering iron glows at 372 $\lambda$ C.What is the dominant wavelength emitted by the iron?

(Multiple Choice)

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Question 11

An electron is confined to a box with a dimension of 20 $\mu$ m.If we have done our best to have the electron be at rest,within what range is its velocity likely to be found?

(Multiple Choice)

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Question 12

What is the de Broglie wavelength of a baseball (mass 145 g)travelling at major league fastball speeds (99 mph)?

(Multiple Choice)

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Question 13

Find the largest possible wavelength for electrons (m = 9.11 10^-31kg emitted from sodium (work function is 3.68 10^-19 J)when ultra-violet light (E = 5.90 * 10^-19 J)shines on it.

(Multiple Choice)

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Question 14

Assume all the power consumed by a 75 W light bulb is emitted by the filament,which you can treat as a black-body.Treat the filament as a cylinder of diameter 1.0 mm and length 2.0 cm.What is the peak wavelength of the lightbulb's emission spectrum?

(Multiple Choice)

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Question 15

If a black body emits radiation at a temperature T,what would happen if it were heated to 2T?

(Multiple Choice)

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Question 16

A particle accelerator boosts a proton's kinetic energy so that the de Broglie wavelength of the proton is 4.2 * 10^-15 m.What is the kinetic energy of the proton?

(Multiple Choice)

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Question 17

The photoelectric minimum (threshold)frequency for a material is 3.3 * 10^-7 m.What is the work function for this material?

(Multiple Choice)

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Question 18

A metal has a chemical potential of 8 eV.The probability that an electron will occupy a state with E = 8.1 eV is 0.13.What is the temperature?

(Multiple Choice)

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Question 19

The probability that an electron will occupy a state with E = 8.10 eV at 600 K is 0.125.What is the chemical potential of the metal?

(Multiple Choice)

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Question 20

Showing 1 - 20 of 68

Exam 36: Quantum Physics

During the photoelectric effect,that forms the basis of photovoltaic solar cells,a beam of monochromatic light consisting of an unknown number of photons knock electrons out of a metal producing an electrical current.For this effect,which statement is always true?

Given the work function of sodium is 2.75 eV,what is the stopping potential in an experiment using sodium cathodes at 360 nm?

Assume all the power consumed by a 75 W light bulb is emitted by the filament,which you can treat as a black-body.Treat the filament as a cylinder of diameter 1.0 mm and length 1.5 cm.What is the temperature of the filament?

A nocturnal bird's eye can to detect monochromatic light of frequency 6.38 * 1014 Hz with a power as small as 2.1 * 10-17 W.What is the corresponding number of photons per second a nocturnal bird's eye can detect?

What is the wavelength of an electron which is accelerated from rest through a potential difference of 10-5 V?

What is the minimum wavelength of light which can cause electron emission from copper?

Nitrogen molecules of mass,m = 4.648 * 10-26 kg each,have a speed of 270 m/s and are incident on a double slit.How far apart are the double slits if a nitrogen molecule fringe pattern,with fringes 0.40 cm apart,is observed on a screen 60.0 cm in front of the slits.

A nitrogen molecule of mass,m = 4.648 * 10-26 kg,has a deBroglie wavelength of 6.19 * 10-11 m.Determine its its speed.

An electron is travelling at 0.7c.What is the deBroglie wavelength of this electron?

A 71-kg sprinter runs at a speed of 12.1 m/s.What is the minimum uncertainty in his position?

A soldering iron glows at 372 λ\lambdaλ C.What is the dominant wavelength emitted by the iron?

An electron is confined to a box with a dimension of 20 μ\muμ m.If we have done our best to have the electron be at rest,within what range is its velocity likely to be found?

What is the de Broglie wavelength of a baseball (mass 145 g)travelling at major league fastball speeds (99 mph)?

Find the largest possible wavelength for electrons (m = 9.11 *10-31kg emitted from sodium (work function is 3.68 * 10-19 J)when ultra-violet light (E = 5.90 * 10-19 J)shines on it.

Assume all the power consumed by a 75 W light bulb is emitted by the filament,which you can treat as a black-body.Treat the filament as a cylinder of diameter 1.0 mm and length 2.0 cm.What is the peak wavelength of the lightbulb's emission spectrum?

If a black body emits radiation at a temperature T,what would happen if it were heated to 2T?

A particle accelerator boosts a proton's kinetic energy so that the de Broglie wavelength of the proton is 4.2 * 10-15 m.What is the kinetic energy of the proton?

The photoelectric minimum (threshold)frequency for a material is 3.3 * 10-7 m.What is the work function for this material?

A metal has a chemical potential of 8 eV.The probability that an electron will occupy a state with E = 8.1 eV is 0.13.What is the temperature?

The probability that an electron will occupy a state with E = 8.10 eV at 600 K is 0.125.What is the chemical potential of the metal?

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A nocturnal bird's eye can to detect monochromatic light of frequency 6.38 * 10¹⁴ Hz with a power as small as 2.1 * 10^-17 W.What is the corresponding number of photons per second a nocturnal bird's eye can detect?

What is the wavelength of an electron which is accelerated from rest through a potential difference of 10^-5 V?

Nitrogen molecules of mass,m = 4.648 * 10^-26 kg each,have a speed of 270 m/s and are incident on a double slit.How far apart are the double slits if a nitrogen molecule fringe pattern,with fringes 0.40 cm apart,is observed on a screen 60.0 cm in front of the slits.

A nitrogen molecule of mass,m = 4.648 * 10^-26 kg,has a deBroglie wavelength of 6.19 * 10^-11 m.Determine its its speed.

A soldering iron glows at 372 $\lambda$ C.What is the dominant wavelength emitted by the iron?

An electron is confined to a box with a dimension of 20 $\mu$ m.If we have done our best to have the electron be at rest,within what range is its velocity likely to be found?

Find the largest possible wavelength for electrons (m = 9.11 10^-31kg emitted from sodium (work function is 3.68 10^-19 J)when ultra-violet light (E = 5.90 * 10^-19 J)shines on it.

A particle accelerator boosts a proton's kinetic energy so that the de Broglie wavelength of the proton is 4.2 * 10^-15 m.What is the kinetic energy of the proton?

The photoelectric minimum (threshold)frequency for a material is 3.3 * 10^-7 m.What is the work function for this material?