Determine the de Broglie wavelength of a neutron (m = 1.67 × 10-27 kg) that has a speed of 5.0 m/s.

A) 79 nm B) 162 nm C) 395 nm D) 529 nm E) 1980 nm A) 79 nm B) 162 nm C) 395 nm D) 529 nm E) 1980 nm

A laser emits a single, 3.0-ms pulse of light that has a frequency of 2.83 × 1011 Hz and a total power of 65 000 W. How many photons are in the pulse?

A) 6.0 × 1023 B) 1.2 × 1024 C) 2.4 × 1025 D) 3.6 × 1025 E) 4.8 × 1026 A) 6.0 × 1023 B) 1.2 × 1024 C) 2.4 × 1025 D) 3.6 × 1025 E) 4.8 × 1026

Exam 29: Particles and Waves

A physicist wishes to produce electrons by shining light on a metal surface. The light source emits light with a wavelength of 450 nm. The table lists the only available metals and their work functions. -Which entry in the table below correctly identifies the metal that will produce the most energetic electrons and their energies?

(Multiple Choice)

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Question 21

A physicist wishes to produce electrons by shining light on a metal surface. The light source emits light with a wavelength of 450 nm. The table lists the only available metals and their work functions. -Which metal(s) can be used to produce electrons by the photoelectric effect?

(Multiple Choice)

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Question 22

What is the speed of an electron that has the same momentum as a photon with a wavelength in vacuum of 488 nm? The mass of an electron is 9.11 × 10^-³¹ kg.

(Multiple Choice)

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Question 23

Electrons are emitted from a certain metal with a maximum kinetic energy of 2 eV when 6-eV photons are incident on its surface. If photons of twice the wavelength are incident on this metal which one of the following statements is true?

(Multiple Choice)

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Question 24

If Planck's constant were changed to 660 J . s, what would be the minimum uncertainty in the position of a 120-kg football player running at a speed of 3.5 m/s?

(Multiple Choice)

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Question 25

In a computer monitor, electrons approach the screen at 1.20 × 10⁸ m/s. What is the de Broglie wavelength of these electrons? Note: the mass of electrons is 9.109 × 10^-³¹ kg; and use the relativistic momentum in your calculation.

(Multiple Choice)

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Question 26

Which type of wave motion does not involve photons?

(Multiple Choice)

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Question 27

Determine the de Broglie wavelength of a neutron (m = 1.67 × 10^-²⁷ kg) that has a speed of 5.0 m/s.

(Multiple Choice)

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Question 28

In the Compton effect, a photon of wavelength $\lambda$ and frequency f hits an electron that is initially at rest. Which one of the following occurs as a result of the collision?

(Multiple Choice)

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Question 29

Which one of the following is demonstrated by the Compton effect?

(Multiple Choice)

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Question 30

What is the kinetic energy of each electron in a beam of electrons if the beam produces a diffraction pattern of a crystal which is similar to that of a beam of 1.00 eV neutrons? Note: The electron mass is 9.11 × 10^-³¹ kg; and the neutron mass is 1.67 × 10^-²⁷ kg.

(Multiple Choice)

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Question 31

Complete the following statement: The photon description of light is necessary to explain

(Multiple Choice)

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Question 32

What kinetic energy must each neutron in a beam of neutrons have if each has a wavelength of 0.10 nm? The mass of a neutron is 1.67 × 10^-²⁷ kg.

(Multiple Choice)

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Question 33

An X-ray generator produces photons with energy 49 600 eV or less. Which one of the following phrases most accurately describes the wavelength of these photons?

(Multiple Choice)

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Question 34

Incident X-rays in a Compton scattering experiment have a wavelength of 0.400 nm. Determine the wavelength of the scattered X-rays that are detected at an angle of 80.0°. The Compton wavelength of the electron is 2.43 × 10^-¹² m.

(Multiple Choice)

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Question 35

White light consisting of wavelengths 380 nm $\le$ $\lambda$ $\le$ 750 nm is incident on a lead surface. For which one of the following ranges of wavelengths will photoelectrons be emitted from the lead surface that has a work function W₀ = 6.63 × 10^-¹⁹ J?

(Multiple Choice)

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Question 36

A laser emits a single, 3.0-ms pulse of light that has a frequency of 2.83 × 10¹¹ Hz and a total power of 65 000 W. How many photons are in the pulse?

(Multiple Choice)

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Question 37

The graph shows the variation in radiation intensity per unit wavelength versus wavelength for a perfect blackbody at temperature T. Complete the following statement: As the blackbody temperature is increased, the peak in intensity of this curve

(Multiple Choice)

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Question 38

Complete the following statement: The term photon applies

(Multiple Choice)

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Question 39

Light is usually thought of as wave-like in nature and electrons as particle-like. In which one of the following instances does light behave as a particle or does an electron behave as a wave?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 54

Exam 29: Particles and Waves

A physicist wishes to produce electrons by shining light on a metal surface. The light source emits light with a wavelength of 450 nm. The table lists the only available metals and their work functions. -Which metal(s) can be used to produce electrons by the photoelectric effect?

What is the speed of an electron that has the same momentum as a photon with a wavelength in vacuum of 488 nm? The mass of an electron is 9.11 × 10-31 kg.

Electrons are emitted from a certain metal with a maximum kinetic energy of 2 eV when 6-eV photons are incident on its surface. If photons of twice the wavelength are incident on this metal which one of the following statements is true?

If Planck's constant were changed to 660 J . s, what would be the minimum uncertainty in the position of a 120-kg football player running at a speed of 3.5 m/s?

In a computer monitor, electrons approach the screen at 1.20 × 108 m/s. What is the de Broglie wavelength of these electrons? Note: the mass of electrons is 9.109 × 10-31 kg; and use the relativistic momentum in your calculation.

Which type of wave motion does not involve photons?

Determine the de Broglie wavelength of a neutron (m = 1.67 × 10-27 kg) that has a speed of 5.0 m/s.

In the Compton effect, a photon of wavelength λ\lambdaλ and frequency f hits an electron that is initially at rest. Which one of the following occurs as a result of the collision?

Which one of the following is demonstrated by the Compton effect?

What is the kinetic energy of each electron in a beam of electrons if the beam produces a diffraction pattern of a crystal which is similar to that of a beam of 1.00 eV neutrons? Note: The electron mass is 9.11 × 10-31 kg; and the neutron mass is 1.67 × 10-27 kg.

Complete the following statement: The photon description of light is necessary to explain

What kinetic energy must each neutron in a beam of neutrons have if each has a wavelength of 0.10 nm? The mass of a neutron is 1.67 × 10-27 kg.

An X-ray generator produces photons with energy 49 600 eV or less. Which one of the following phrases most accurately describes the wavelength of these photons?

Incident X-rays in a Compton scattering experiment have a wavelength of 0.400 nm. Determine the wavelength of the scattered X-rays that are detected at an angle of 80.0°. The Compton wavelength of the electron is 2.43 × 10-12 m.

White light consisting of wavelengths 380 nm ≤\le≤ λ\lambdaλ ≤\le≤ 750 nm is incident on a lead surface. For which one of the following ranges of wavelengths will photoelectrons be emitted from the lead surface that has a work function W0 = 6.63 × 10-19 J?

A laser emits a single, 3.0-ms pulse of light that has a frequency of 2.83 × 1011 Hz and a total power of 65 000 W. How many photons are in the pulse?

The graph shows the variation in radiation intensity per unit wavelength versus wavelength for a perfect blackbody at temperature T. Complete the following statement: As the blackbody temperature is increased, the peak in intensity of this curve

Complete the following statement: The term photon applies

Light is usually thought of as wave-like in nature and electrons as particle-like. In which one of the following instances does light behave as a particle or does an electron behave as a wave?

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What is the speed of an electron that has the same momentum as a photon with a wavelength in vacuum of 488 nm? The mass of an electron is 9.11 × 10^-³¹ kg.

In a computer monitor, electrons approach the screen at 1.20 × 10⁸ m/s. What is the de Broglie wavelength of these electrons? Note: the mass of electrons is 9.109 × 10^-³¹ kg; and use the relativistic momentum in your calculation.

Determine the de Broglie wavelength of a neutron (m = 1.67 × 10^-²⁷ kg) that has a speed of 5.0 m/s.

In the Compton effect, a photon of wavelength $\lambda$ and frequency f hits an electron that is initially at rest. Which one of the following occurs as a result of the collision?

What is the kinetic energy of each electron in a beam of electrons if the beam produces a diffraction pattern of a crystal which is similar to that of a beam of 1.00 eV neutrons? Note: The electron mass is 9.11 × 10^-³¹ kg; and the neutron mass is 1.67 × 10^-²⁷ kg.

What kinetic energy must each neutron in a beam of neutrons have if each has a wavelength of 0.10 nm? The mass of a neutron is 1.67 × 10^-²⁷ kg.

Incident X-rays in a Compton scattering experiment have a wavelength of 0.400 nm. Determine the wavelength of the scattered X-rays that are detected at an angle of 80.0°. The Compton wavelength of the electron is 2.43 × 10^-¹² m.

White light consisting of wavelengths 380 nm $\le$ $\lambda$ $\le$ 750 nm is incident on a lead surface. For which one of the following ranges of wavelengths will photoelectrons be emitted from the lead surface that has a work function W₀ = 6.63 × 10^-¹⁹ J?

A laser emits a single, 3.0-ms pulse of light that has a frequency of 2.83 × 10¹¹ Hz and a total power of 65 000 W. How many photons are in the pulse?