Question 1

According to de Broglie,as the momentum of a moving particle is quartered,the corresponding wavelength changes by what factor?

Accepted Answer

A)  1/4 
B)  1/16 
C)  16 
D)  4 
A)  1/4 
B)  1/16 
C)  16 
D)  4

Question 2

The de Broglie wavelength of a 0.060-kg golf ball is 3.56 × 10−34m.What is its speed? (h = 6.63 × 10−34 J⋅s)

Accepted Answer

A)  31 m/s 
B)  15 m/s 
C)  26 m/s 
D)  48 m/s 
A)  31 m/s 
B)  15 m/s 
C)  26 m/s 
D)  48 m/s

Question 3

If a quantum of radiation has an energy of 3.0 keV,what is its wavelength? (h = 6.63 × 10−34 J⋅s,1 eV = 1.60 × 10−19 J,c = 3.00 × 108 m/s,and 1 nm = 10−9 m)

Accepted Answer

A)  0.62 nm 
B)  0.32 nm 
C)  0.41 nm 
D)  1.02 nm 
A)  0.62 nm 
B)  0.32 nm 
C)  0.41 nm 
D)  1.02 nm

Question 4

If the measured momentum of an electron is 3.20 × 10−27 kg⋅m/s with an uncertainty of 4.8 × 10−28 kg⋅m/s,what is the minimum uncertainty in the position? (h = 6.63 × 10−34 J⋅s)

Accepted Answer

A)  0.63 × 10−4 m 
B)  2.2 × 10−7 m 
C)  3.3 × 10−6 m 
D)  1.1 × 10−7 m 
A)  0.63 × 10−4 m 
B)  2.2 × 10−7 m 
C)  3.3 × 10−6 m 
D)  1.1 × 10−7 m

Question 5

How much energy (in eV)does a photon of 500-nm light have? (h = 6.63 × 10−34 J⋅s,c = 3.00 × 108 m/s,1 eV = 1.60 × 10−19 J,and 1 nm = 10−9 m)

Accepted Answer

A)  1.78 eV 
B)  2.48 eV 
C)  1.24 eV 
D)  3.11 eV 
A)  1.78 eV 
B)  2.48 eV 
C)  1.24 eV 
D)  3.11 eV

Question 6

Which of the following is an indication that one is dealing with a wave property instead of a particle property?

Accepted Answer

A)  energy 
B)  quanta 
C)  interference 
D)  momentum 
A)  energy 
B)  quanta 
C)  interference 
D)  momentum

Question 7

What is the energy of a photon whose frequency is 7.9 × 1020 Hz? (h = 6.63 × 10−34 J⋅s and 1 eV = 1.60 × 10−19 J)

Accepted Answer

A)  5.0 MeV 
B)  3.3 MeV 
C)  1.6 MeV 
D)  2.5 MeV 
A)  5.0 MeV 
B)  3.3 MeV 
C)  1.6 MeV 
D)  2.5 MeV

Question 8

What is the energy of a photon that has the same wavelength as a 24 eV electron? (h = 6.63 × 10−34 J⋅s,me = 9.11 × 10−31 kg)

Accepted Answer

A)  24 eV 
B)  14 × 10-16 eV 
C)  3.5 keV 
D)  5.0 keV 
A)  24 eV 
B)  14 × 10-16 eV 
C)  3.5 keV 
D)  5.0 keV

Question 9

The microwave in the kitchen has a label that indicates it produces its microwaves at a frequency of 2450 MHz.What is the energy associated with one of these microwave photons? (h = 6.63 × 10−34 J⋅s)

Accepted Answer

A)  3.19 × 10-2 eV 
B)  2.45 eV 
C)  1.02 × 10-5 eV 
D)  1.62 eV 
A)  3.19 × 10-2 eV 
B)  2.45 eV 
C)  1.02 × 10-5 eV 
D)  1.62 eV

Question 10

Star A has the peak of its blackbody radiation at λA.Star B has its peak at λB,which is one-third that of λA.If Star A's surface temperature is TA,how does the surface temperature TB of Star B compare?

Accepted Answer

A)  TB = TA/9 
B)  TB = 3TA 
C)  TB = 9 TA 
D)  TB = TA/3 
A)  TB = TA/9 
B)  TB = 3TA 
C)  TB = 9 TA 
D)  TB = TA/3

Question 11

A helium-neon laser emits red light having a wavelength of 632.8 nm and a power of 10 mW.How many photons are emitted each second? (h = 6.63 × 10−34 J⋅s,c = 3.00 × 108 m/s,and 1 nm = 10−9 m)

Accepted Answer

A)  4.8 × 1017 
B)  1.6 × 1015 
C)  3.2 × 1016 
D)  2.6 × 1018 
A)  4.8 × 1017 
B)  1.6 × 1015 
C)  3.2 × 1016 
D)  2.6 × 1018

Question 12

What is the maximum velocity of a photoelectron emitted from a surface with work function 5.22 eV when illuminated by 200-nm ultraviolet light? (melectron = 9.11 × 10−31 kg,h = 6.63 × 10−34 J⋅s,1 eV = 1.60 × 10−19 J,and 1 nm = 10−9 m)

Accepted Answer

A)  800,000 m/s 
B)  212,000 m/s 
C)  653,000 m/s 
D)  591,000 m/s 
A)  800,000 m/s 
B)  212,000 m/s 
C)  653,000 m/s 
D)  591,000 m/s

Question 13

A quantum of radiation has an energy of 1.3 keV.What is its frequency? (h = 6.63 × 10−34 J⋅s and 1 eV = 1.60 × 10−19 J)

Accepted Answer

A)  6.3 × 1017 Hz 
B)  3.1 × 1017 Hz 
C)  4.8 × 1017 Hz 
D)  7.2 × 1017 Hz 
A)  6.3 × 1017 Hz 
B)  3.1 × 1017 Hz 
C)  4.8 × 1017 Hz 
D)  7.2 × 1017 Hz

Question 14

What is the de Broglie wavelength for a proton (m = 1.67 × 10−27 kg)moving at a speed of 3.0 × 106 m/s? (h = 6.63 × 10−34 J⋅s)

Accepted Answer

A)  0.33 × 10−13 m 
B)  1.3 × 10−13 m 
C)  0.66 × 10−13 m 
D)  2.0 × 10−13 m 
A)  0.33 × 10−13 m 
B)  1.3 × 10−13 m 
C)  0.66 × 10−13 m 
D)  2.0 × 10−13 m

Question 15

A proton (mass = 1.67 × 10−27 kg)has a kinetic energy of 1.00 MeV.If its momentum is measured with an uncertainty of 2.00%,what is the minimum uncertainty in its position? (h = 6.63 × 10−34 J⋅s and 1 eV = 1.6 × 10−19 J)

Accepted Answer

A)  9.08 × 10−14 m 
B)  1.14 × 10−13 m 
C)  5.64 × 10−14 m 
D)  2.28 × 10−13 m 
A)  9.08 × 10−14 m 
B)  1.14 × 10−13 m 
C)  5.64 × 10−14 m 
D)  2.28 × 10−13 m

Question 16

What is the wavelength of a monochromatic light beam,where the photon energy is 4.81 × 10−19 J? (h = 6.63 × 10−34 J⋅s,c = 3.00 × 108 m/s,and 1 nm = 10−9 m)

Accepted Answer

A)  354 nm 
B)  414 nm 
C)  787 nm 
D)  398 nm 
A)  354 nm 
B)  414 nm 
C)  787 nm 
D)  398 nm

Question 17

Which change will not affect the kinetic energy of the most energetic electrons emitted in the photoelectric effect?

Accepted Answer

A)  changing the frequency of the light 
B)  changing the metal the light is hitting 
C)  changing the brightness of the light 
D)  All of the above will affect the electron's kinetic energy. 
A)  changing the frequency of the light 
B)  changing the metal the light is hitting 
C)  changing the brightness of the light 
D)  All of the above will affect the electron's kinetic energy.

Question 18

Starting from rest,an electron accelerates through a potential difference of 67 V.What is its de Broglie wavelength? (h = 6.63 × 10−34 J⋅s,me = 9.11 × 10−31 kg,and 1 eV = 1.60 × 10−19 J)

Accepted Answer

A)  1.1 × 10−10 m 
B)  1.5 × 10−10 m 
C)  1.9 × 10−10 m 
D)  2.3 × 10−10 m 
A)  1.1 × 10−10 m 
B)  1.5 × 10−10 m 
C)  1.9 × 10−10 m 
D)  2.3 × 10−10 m

Exam 28: Atomic Physics: Part A

According to de Broglie,as the momentum of a moving particle is quartered,the corresponding wavelength changes by what factor?

The de Broglie wavelength of a 0.060-kg golf ball is 3.56 × 10−34m.What is its speed? (h = 6.63 × 10−34 J⋅s)

If a quantum of radiation has an energy of 3.0 keV,what is its wavelength? (h = 6.63 × 10−34 J⋅s,1 eV = 1.60 × 10−19 J,c = 3.00 × 108 m/s,and 1 nm = 10−9 m)

If the measured momentum of an electron is 3.20 × 10−27 kg⋅m/s with an uncertainty of 4.8 × 10−28 kg⋅m/s,what is the minimum uncertainty in the position? (h = 6.63 × 10−34 J⋅s)

How much energy (in eV)does a photon of 500-nm light have? (h = 6.63 × 10−34 J⋅s,c = 3.00 × 108 m/s,1 eV = 1.60 × 10−19 J,and 1 nm = 10−9 m)

Which of the following is an indication that one is dealing with a wave property instead of a particle property?

What is the energy of a photon whose frequency is 7.9 × 1020 Hz? (h = 6.63 × 10−34 J⋅s and 1 eV = 1.60 × 10−19 J)

What is the energy of a photon that has the same wavelength as a 24 eV electron? (h = 6.63 × 10−34 J⋅s,me = 9.11 × 10−31 kg)

The microwave in the kitchen has a label that indicates it produces its microwaves at a frequency of 2450 MHz.What is the energy associated with one of these microwave photons? (h = 6.63 × 10−34 J⋅s)

Star A has the peak of its blackbody radiation at λA.Star B has its peak at λB,which is one-third that of λA.If Star A's surface temperature is TA,how does the surface temperature TB of Star B compare?

A helium-neon laser emits red light having a wavelength of 632.8 nm and a power of 10 mW.How many photons are emitted each second? (h = 6.63 × 10−34 J⋅s,c = 3.00 × 108 m/s,and 1 nm = 10−9 m)

What is the maximum velocity of a photoelectron emitted from a surface with work function 5.22 eV when illuminated by 200-nm ultraviolet light? (melectron = 9.11 × 10−31 kg,h = 6.63 × 10−34 J⋅s,1 eV = 1.60 × 10−19 J,and 1 nm = 10−9 m)

A quantum of radiation has an energy of 1.3 keV.What is its frequency? (h = 6.63 × 10−34 J⋅s and 1 eV = 1.60 × 10−19 J)

What is the de Broglie wavelength for a proton (m = 1.67 × 10−27 kg)moving at a speed of 3.0 × 106 m/s? (h = 6.63 × 10−34 J⋅s)

A proton (mass = 1.67 × 10−27 kg)has a kinetic energy of 1.00 MeV.If its momentum is measured with an uncertainty of 2.00%,what is the minimum uncertainty in its position? (h = 6.63 × 10−34 J⋅s and 1 eV = 1.6 × 10−19 J)

What is the wavelength of a monochromatic light beam,where the photon energy is 4.81 × 10−19 J? (h = 6.63 × 10−34 J⋅s,c = 3.00 × 108 m/s,and 1 nm = 10−9 m)

Which change will not affect the kinetic energy of the most energetic electrons emitted in the photoelectric effect?

Starting from rest,an electron accelerates through a potential difference of 67 V.What is its de Broglie wavelength? (h = 6.63 × 10−34 J⋅s,me = 9.11 × 10−31 kg,and 1 eV = 1.60 × 10−19 J)

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

Filters

The de Broglie wavelength of a 0.060-kg golf ball is 3.56 × 10−³⁴m.What is its speed? (h = 6.63 × 10−³⁴ J⋅s)

If a quantum of radiation has an energy of 3.0 keV,what is its wavelength? (h = 6.63 × 10−³⁴ J⋅s,1 eV = 1.60 × 10−¹⁹ J,c = 3.00 × 10⁸ m/s,and 1 nm = 10−⁹ m)

If the measured momentum of an electron is 3.20 × 10−²⁷ kg⋅m/s with an uncertainty of 4.8 × 10−²⁸ kg⋅m/s,what is the minimum uncertainty in the position? (h = 6.63 × 10−³⁴ J⋅s)

How much energy (in eV)does a photon of 500-nm light have? (h = 6.63 × 10−³⁴ J⋅s,c = 3.00 × 10⁸ m/s,1 eV = 1.60 × 10−¹⁹ J,and 1 nm = 10−⁹ m)

What is the energy of a photon whose frequency is 7.9 × 10²⁰ Hz? (h = 6.63 × 10−³⁴ J⋅s and 1 eV = 1.60 × 10−¹⁹ J)

What is the energy of a photon that has the same wavelength as a 24 eV electron? (h = 6.63 × 10−³⁴ J⋅s,m_e = 9.11 × 10−³¹ kg)

The microwave in the kitchen has a label that indicates it produces its microwaves at a frequency of 2450 MHz.What is the energy associated with one of these microwave photons? (h = 6.63 × 10−³⁴ J⋅s)

Star A has the peak of its blackbody radiation at λ_A.Star B has its peak at λ_B,which is one-third that of λ_A.If Star A's surface temperature is T_A,how does the surface temperature T_B of Star B compare?

A helium-neon laser emits red light having a wavelength of 632.8 nm and a power of 10 mW.How many photons are emitted each second? (h = 6.63 × 10−³⁴ J⋅s,c = 3.00 × 10⁸ m/s,and 1 nm = 10−⁹ m)

What is the maximum velocity of a photoelectron emitted from a surface with work function 5.22 eV when illuminated by 200-nm ultraviolet light? (m_electron = 9.11 × 10−³¹ kg,h = 6.63 × 10−³⁴ J⋅s,1 eV = 1.60 × 10−¹⁹ J,and 1 nm = 10−⁹ m)

A quantum of radiation has an energy of 1.3 keV.What is its frequency? (h = 6.63 × 10−³⁴ J⋅s and 1 eV = 1.60 × 10−¹⁹ J)

What is the de Broglie wavelength for a proton (m = 1.67 × 10−²⁷ kg)moving at a speed of 3.0 × 10⁶ m/s? (h = 6.63 × 10−³⁴ J⋅s)

A proton (mass = 1.67 × 10−²⁷ kg)has a kinetic energy of 1.00 MeV.If its momentum is measured with an uncertainty of 2.00%,what is the minimum uncertainty in its position? (h = 6.63 × 10−³⁴ J⋅s and 1 eV = 1.6 × 10−¹⁹ J)

What is the wavelength of a monochromatic light beam,where the photon energy is 4.81 × 10−¹⁹ J? (h = 6.63 × 10−³⁴ J⋅s,c = 3.00 × 10⁸ m/s,and 1 nm = 10−⁹ m)

Starting from rest,an electron accelerates through a potential difference of 67 V.What is its de Broglie wavelength? (h = 6.63 × 10−³⁴ J⋅s,m_e = 9.11 × 10−³¹ kg,and 1 eV = 1.60 × 10−¹⁹ J)