Question 1

In an experiment to determine the speed and position of an electron (m = 9.11 × 10-31 kg) , three researchers claim to have measured the position of the electron to within ± 10-9 m.They reported the following values for the speed of the electron: -31 kg) , three researchers claim to have measured the position of the electron to within ± 10-9 m.They reported the following values for the speed of the electron:   Which of these measurements violates one or more basic laws of modern physics? A) A only B) B only C) A and B D) B and C E) A, B, and C" class="answers-bank-image d-inline" rel="preload" > Which of these measurements violates one or more basic laws of modern physics?

Accepted Answer

A)  A only
B)  B only
C)  A and B
D)  B and C
E)  A, B, and CF) D) and E)
G) A) and D)

Question 2

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?

Accepted Answer

A)  0.032 m
B)  0.065 m
C)  0.13 m
D)  0.25 m
E)  0.50 mF) A) and C)
G) All of the above

Question 3

A laser emits photons of energy 5.0 eV with a power of 10-2 W.How many photons are emitted each second?

Accepted Answer

A)  4.0 × 1014
B)  2.7 × 1015
C)  5.0 × 1018
D)  3.1 × 1021
E)  2.5 × 1021F) B) and E)
G) C) and E)

Question 4

The position of a hydrogen atom (m = 1.7 × 10-27 kg)  is known to within 2.0 × 10-6 m.What is the minimum uncertainty in the atom's velocity?

Accepted Answer

A)  zero m/s
B)  0.0085 m/s
C)  0.011 m/s
D)  0.016 m/s
E)  0.031 m/sF) A) and E)
G) B) and D)

Question 5

When ultraviolet photons with a wavelength of 3.45 × 10-7 m are directed at the surface of an unknown metal in vacuum, electrons with a maximum kinetic energy of 1.52 eV are emitted from the surface.What is the work function of the metal?

Accepted Answer

A)  3.60 eV
B)  3.11 eV
C)  2.59 eV
D)  2.08 eV
E)  1.98 eVF) D) and E)
G) A) and D)

Question 6

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.

Accepted Answer

A)  0.041 nm
B)  0.398 nm
C)  0.399 nm
D)  0.402 nm
E)  0.403 nmF) D) and E)
G) C) and E)

Question 7

The x component of the velocity of an electron (m = 9.11 × 10-31 kg)  is known to be between 100 m/s and 300 m/s.Which one of the following is a true statement concerning the uncertainty in the x coordinate of the electron?

Accepted Answer

A)  The maximum uncertainty is about 106 m.
B)  The minimum uncertainty is about 3 × 10-7 m.
C)  The maximum uncertainty is about 6 × 10-7 m.
D)  The minimum uncertainty is about 3 × 10-9 m.
E)  The maximum uncertainty is about 6 × 10-9 m.F) A) and D)
G) A) and C)

Question 8

Photons of what minimum frequency are required to remove electrons from gold? Note: The work function for gold is 4.8 eV.

Accepted Answer

A)  7.3 × 1014 Hz
B)  1.2 × 1015 Hz
C)  3.8 × 1017 Hz
D)  6.5 × 1015 Hz
E)  4.6 × 1014 HzF) A) and B)
G) All of the above

Question 9

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?

Accepted Answer

A)  0.025 nm or longer
B)  0.050 nm or longer
C)  0.75 nm or longer
D)  0.25 nm or shorter
E)  0.75 nm or shorterF) C) and D)
G) A) and D)

Question 10

Complete the following statement: According to the de Broglie relation, the wavelength of a "matter" wave is inversely proportional to

Accepted Answer

A)  Planck's constant.
B)  the mass of the particle.
C)  the momentum of the particle.
D)  the frequency of the wave.
E)  the speed of the particle.F) C) and E)
G) B) and C)

Question 11

29-2
It is desired to obtain a diffraction pattern for electrons using a diffraction grating with lines separated by 10 nm.The mass of an electron is 9.11 × 10-31 kg.
-What is the approximate kinetic energy of electrons that would be diffracted by such a grating?

Accepted Answer

A)  1.5 × 10-6 eV
B)  1.5 × 10-4 eV
C)  1.5 × 10-2 eV
D)  1.5 × 102 eV
E)  1.5 × 108 eVF) D) and E)
G) A) and C)

Question 12

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?

Accepted Answer

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

Question 13

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.

Accepted Answer

A)  1830 eV
B)  42.8 eV
C)  3.35 × 106 eV
D)  5.46 × 10-4 eV
E)  2.34 × 10-2 eVF) B) and E)
G) C) and D)

Question 14

A proton (mp = 1.673 × 10-27 kg)  and an electron (me = 9.109 × 10-31 kg)  are confined such that the x position of each is known to within 1.50 × 10-10 m.What is the ratio of the minimum uncertainty in the x component of the velocity of the electron to that of the proton,  Δ\DeltaΔ ve/ Δ\DeltaΔ vp?

Accepted Answer

A)  5.444 × 10-4
B)  0.2272
C)  808.2
D)  1837
E)  36 290 F) B) and D)
G) A) and E)

Question 15

Complete the following statement: The term photon applies

Accepted Answer

A)  only to X-rays.
B)  only to visible light.
C)  to any form of wave motion.
D)  to any form of particle motion.
E)  to any form of electromagnetic radiation.F) All of the above
G) None of the above

Question 16

Complete the following statement: The photon or "particle" theory of electromagnetic radiation is necessary to explain the

Accepted Answer

A)  refraction of light by a prism.
B)  diffraction of light by a grating.
C)  reflection of light from a mirrored surface.
D)  results of Compton scattering experiments.
E)  interference of light in Young's double-slit experiment.F) B) and E)
G) C) and D)

Question 17

The de Broglie wavelength of an electron (m = 9.11 × 10-31 kg)  is 1.2 × 10-10 m.Determine the kinetic energy of the electron.

Accepted Answer

A)  1.5 × 10-15 J
B)  1.6 × 10-16 J
C)  1.7 × 10-17 J
D)  1.8 × 10-18 J
E)  1.9 × 10-19 JF) C) and D)
G) A) and C)

Question 18

29-1
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?

Accepted Answer

A)  barium only
B)  tungsten only
C)  tungsten or tantalum
D)  barium or lithium
E)  lithium, tantalum, or tungstenF) A) and E)
G) A) and C)

Question 19

The work function for a particular metal is 4.0 eV.Which one of the following best describes the wavelength of electromagnetic radiation needed to eject electrons from this metal?

Accepted Answer

A)  310 nm or greater
B)  310 nm or smaller
C)  620 nm or greater
D)  620 nm or smaller
E)  800 nm or greaterF) A) and B)
G) C) and E)

Question 20

The position of a 1-g object moving in the x direction at 1 cm/s is known to within ± 10 nm.In which range is the fractional uncertainty, ( Δ\DeltaΔ px) /px , in the x component of its momentum?

Accepted Answer

A)  10-2 to 10-4
B)  10-12 to 10-14
C)  10-16 to 10-18
D)  10-20 to 10-22
E)  less than 10-30 F) B) and D)
G) A) and B)

Exam 29: Particles and Waves

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.

Correct Answer
verified

Complete the following statement: According to the de Broglie relation, the wavelength of a "matter" wave is inversely proportional to

Correct Answer
verified

The position of a 1-g object moving in the x direction at 1 cm/s is known to within ± 10 nm.In which range is the fractional uncertainty, ( $\Delta$ p_x) /p_x , in the x component of its momentum?

Correct Answer
verified

Complete the following statement: The photon or "particle" theory of electromagnetic radiation is necessary to explain the

Correct Answer
verified

When ultraviolet photons with a wavelength of 3.45 × 10^-⁷ m are directed at the surface of an unknown metal in vacuum, electrons with a maximum kinetic energy of 1.52 eV are emitted from the surface.What is the work function of the metal?

Correct Answer
verified

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.

Correct Answer
verified

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?

Correct Answer
verified

The position of a hydrogen atom (m = 1.7 × 10^-²⁷ kg) is known to within 2.0 × 10^-⁶ m.What is the minimum uncertainty in the atom's velocity?

Correct Answer
verified

A laser emits photons of energy 5.0 eV with a power of 10^-² W.How many photons are emitted each second?

Correct Answer
verified

The x component of the velocity of an electron (m = 9.11 × 10^-³¹ kg) is known to be between 100 m/s and 300 m/s.Which one of the following is a true statement concerning the uncertainty in the x coordinate of the electron?

Correct Answer
verified

Photons of what minimum frequency are required to remove electrons from gold? Note: The work function for gold is 4.8 eV.

Correct Answer
verified

Complete the following statement: The term photon applies

Correct Answer
verified

The de Broglie wavelength of an electron (m = 9.11 × 10^-³¹ kg) is 1.2 × 10^-¹⁰ m.Determine the kinetic energy of the electron.

Correct Answer
verified

Correct Answer
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Correct Answer
verified

The work function for a particular metal is 4.0 eV.Which one of the following best describes the wavelength of electromagnetic radiation needed to eject electrons from this metal?

Correct Answer
verified

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?

Correct Answer
verified

29-2 It is desired to obtain a diffraction pattern for electrons using a diffraction grating with lines separated by 10 nm.The mass of an electron is 9.11 × 10^-³¹ kg. -What is the approximate kinetic energy of electrons that would be diffracted by such a grating?

Correct Answer
verified

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?

Correct Answer
verified

29-1 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?

Correct Answer
verified

Exam 29: Particles and Waves

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.

Correct AnswerverifiedShow Answer

Complete the following statement: According to the de Broglie relation, the wavelength of a "matter" wave is inversely proportional to

Correct AnswerverifiedShow Answer

The position of a 1-g object moving in the x direction at 1 cm/s is known to within ± 10 nm.In which range is the fractional uncertainty, ( Δ\DeltaΔ px) /px , in the x component of its momentum?

Correct AnswerverifiedShow Answer

Complete the following statement: The photon or "particle" theory of electromagnetic radiation is necessary to explain the

Correct AnswerverifiedShow Answer

When ultraviolet photons with a wavelength of 3.45 × 10-7 m are directed at the surface of an unknown metal in vacuum, electrons with a maximum kinetic energy of 1.52 eV are emitted from the surface.What is the work function of the metal?

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

The position of a hydrogen atom (m = 1.7 × 10-27 kg) is known to within 2.0 × 10-6 m.What is the minimum uncertainty in the atom's velocity?

Correct AnswerverifiedShow Answer

A laser emits photons of energy 5.0 eV with a power of 10-2 W.How many photons are emitted each second?

Correct AnswerverifiedShow Answer

The x component of the velocity of an electron (m = 9.11 × 10-31 kg) is known to be between 100 m/s and 300 m/s.Which one of the following is a true statement concerning the uncertainty in the x coordinate of the electron?

Correct AnswerverifiedShow Answer

Photons of what minimum frequency are required to remove electrons from gold? Note: The work function for gold is 4.8 eV.

Correct AnswerverifiedShow Answer

Complete the following statement: The term photon applies

Correct AnswerverifiedShow Answer

The de Broglie wavelength of an electron (m = 9.11 × 10-31 kg) is 1.2 × 10-10 m.Determine the kinetic energy of the electron.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The work function for a particular metal is 4.0 eV.Which one of the following best describes the wavelength of electromagnetic radiation needed to eject electrons from this metal?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

29-2 It is desired to obtain a diffraction pattern for electrons using a diffraction grating with lines separated by 10 nm.The mass of an electron is 9.11 × 10-31 kg. -What is the approximate kinetic energy of electrons that would be diffracted by such a grating?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

29-1 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?

Correct AnswerverifiedShow Answer

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.

Correct Answer
verified

Correct Answer
verified

The position of a 1-g object moving in the x direction at 1 cm/s is known to within ± 10 nm.In which range is the fractional uncertainty, ( $\Delta$ p_x) /p_x , in the x component of its momentum?

Correct Answer
verified

Correct Answer
verified

When ultraviolet photons with a wavelength of 3.45 × 10^-⁷ m are directed at the surface of an unknown metal in vacuum, electrons with a maximum kinetic energy of 1.52 eV are emitted from the surface.What is the work function of the metal?

Correct Answer
verified

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.

Correct Answer
verified

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?

Correct Answer
verified

The position of a hydrogen atom (m = 1.7 × 10^-²⁷ kg) is known to within 2.0 × 10^-⁶ m.What is the minimum uncertainty in the atom's velocity?

Correct Answer
verified

A laser emits photons of energy 5.0 eV with a power of 10^-² W.How many photons are emitted each second?

Correct Answer
verified

The x component of the velocity of an electron (m = 9.11 × 10^-³¹ kg) is known to be between 100 m/s and 300 m/s.Which one of the following is a true statement concerning the uncertainty in the x coordinate of the electron?

Correct Answer
verified

Correct Answer
verified

Correct Answer
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The de Broglie wavelength of an electron (m = 9.11 × 10^-³¹ kg) is 1.2 × 10^-¹⁰ m.Determine the kinetic energy of the electron.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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29-2 It is desired to obtain a diffraction pattern for electrons using a diffraction grating with lines separated by 10 nm.The mass of an electron is 9.11 × 10^-³¹ kg. -What is the approximate kinetic energy of electrons that would be diffracted by such a grating?

Correct Answer
verified

Correct Answer
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Correct Answer
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