Question 1

Which of the following statements concerning particles and waves is/are correct?

Accepted Answer

A)  Uncharged particles travel in straight lines until they collide with something. 
B)  When two particles meet in space, they never produce an interference pattern. 
C)  When a large number of small particles exchange a small amount of energy, the exchange cannot be distinguished from that of a wave. 
D)  When two waves of equal intensity and originating from coherent sources meet in space, the resulting wave can have an intensity anywhere from zero to four times the intensity of each of the original waves. 
E)  All of the above are correct. 
A)  Uncharged particles travel in straight lines until they collide with something. 
B)  When two particles meet in space, they never produce an interference pattern. 
C)  When a large number of small particles exchange a small amount of energy, the exchange cannot be distinguished from that of a wave. 
D)  When two waves of equal intensity and originating from coherent sources meet in space, the resulting wave can have an intensity anywhere from zero to four times the intensity of each of the original waves. 
E)  All of the above are correct.

Question 2

What is the momentum (in SI units) of a photon of wavelength $\lambda$ = 480 nm? (Planck's constant h = 6.626 * 10-34 J·s)

Accepted Answer

A)  7.24 * 10-27 kg m/s 
B)  6.21 * 10-27 kg m/s 
C)  4.14 *10-27 kg m/s 
D)  2.76 * 10-27 kg m/s 
E)  1.38 * 10-27 kg m/s 
A)  7.24 * 10-27 kg m/s 
B)  6.21 * 10-27 kg m/s 
C)  4.14 *10-27 kg m/s 
D)  2.76 * 10-27 kg m/s 
E)  1.38 * 10-27 kg m/s

Question 3

Calculate the photon energy for light of wavelength 500 nm. (Planck's constant h = 6.626 * 10-34 J·s)

Accepted Answer

A)  1.24 eV 
B)  1.98 eV 
C)  2.24 eV 
D)  2.48 eV 
E)  2.98 eV 
A)  1.24 eV 
B)  1.98 eV 
C)  2.24 eV 
D)  2.48 eV 
E)  2.98 eV

Question 4

If a baseball, an electron, and a photon all have the same momentum, which has the longest wavelength?

Accepted Answer

A)  baseball 
B)  electron 
C)  photon 
D)  all have the same wavelength 
E)  it depends on the energy of the photon 
A)  baseball 
B)  electron 
C)  photon 
D)  all have the same wavelength 
E)  it depends on the energy of the photon

Question 5

The work function for a metal is 5.58 eV. What is the threshold wavelength for the photoelectric effect of incident photons?

Accepted Answer

A)  2.22 *10-7 m 
B)  2.22* 10-9 m 
C)  4.50 * 106 m 
D)  4.50 * 10-6 m 
E)  2.22 * 10-11 m 
A)  2.22 *10-7 m 
B)  2.22* 10-9 m 
C)  4.50 * 106 m 
D)  4.50 * 10-6 m 
E)  2.22 * 10-11 m

Question 6

When a surface is illuminated with light of wavelength 500 nm, the maximum speed of the photoelectrons is 300 km/s. When the same surface is illuminated by light of half this wavelength what is the maximum speed of the photoelectrons in this case?

Accepted Answer

A)  680 km/s 
B)  1280 km/s 
C)  885 km/s 
D)  980 km/s 
E)  14800 km/s 
A)  680 km/s 
B)  1280 km/s 
C)  885 km/s 
D)  980 km/s 
E)  14800 km/s

Question 7

The maximum kinetic energy of photoelectrons produced in the photoelectric effect depends directly on the

Accepted Answer

A)  frequency of the incident photons. 
B)  intensity of the incident photons. 
C)  area of the metal surface from which the photoelectrons are released. 
D)  thickness of the metal. 
E)  photoelectric current. 
A)  frequency of the incident photons. 
B)  intensity of the incident photons. 
C)  area of the metal surface from which the photoelectrons are released. 
D)  thickness of the metal. 
E)  photoelectric current.

Question 8

A gamma-ray photon is back scattered at an angle of 180° after a collision with an electron. If the scattered photon has energy 150 keV, what was the energy of the initial photon?

Accepted Answer

A)  303 keV 
B)  363 keV 
C)  95 keV 
D)  427 keV 
E)  393 keV 
A)  303 keV 
B)  363 keV 
C)  95 keV 
D)  427 keV 
E)  393 keV

Question 9

Which of the following statements about Maxwell's theory of electromagnetism is false?

Accepted Answer

A)  The theory shows that light travels as transverse waves. 
B)  The theory shows that the speed of light is c in vacuum. 
C)  The theory shows that light travels as photons. 
D)  The theory shows that light consists of electric and magnetic waves. 
E)  The theory shows that light does not depend on a medium for it to travel. 
A)  The theory shows that light travels as transverse waves. 
B)  The theory shows that the speed of light is c in vacuum. 
C)  The theory shows that light travels as photons. 
D)  The theory shows that light consists of electric and magnetic waves. 
E)  The theory shows that light does not depend on a medium for it to travel.

Question 10

The speed of an electron whose de Broglie wavelength is 0.0010 m is approximately

Accepted Answer

A)  7.3 * 10-7 m/s 
B)  7.3 * 10-4 m/s 
C)  0.73 m/s 
D)  0.51 km/s 
E)  5.1 * 105 m/s 
A)  7.3 * 10-7 m/s 
B)  7.3 * 10-4 m/s 
C)  0.73 m/s 
D)  0.51 km/s 
E)  5.1 * 105 m/s

Question 11

For the top magnetic lens, the direction of the magnetic field needed to deflect the electrons is

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 12

A particle is in the ground state of an infinite square-well potential. The probability of finding the particle in the region 0 < x < L/3 is

Accepted Answer

A)  0.41 
B)  0.25 
C)  0.20 
D)  0.34 
E)  0.27 
A)  0.41 
B)  0.25 
C)  0.20 
D)  0.34 
E)  0.27

Question 13

In Young's experiment,

Accepted Answer

A)  each slit acts as a line source. 
B)  an interference pattern is observed on a screen placed behind the slits. 
C)  interference maxima occur at angles such that the path difference is an integral number of wavelengths. 
D)  interference minima occur when the path difference is one half wavelength or any odd number of half wavelengths. 
E)  all of the above are correct. 
A)  each slit acts as a line source. 
B)  an interference pattern is observed on a screen placed behind the slits. 
C)  interference maxima occur at angles such that the path difference is an integral number of wavelengths. 
D)  interference minima occur when the path difference is one half wavelength or any odd number of half wavelengths. 
E)  all of the above are correct.

Which of the following statements concerning particles and waves is/are correct?

What is the momentum (in SI units) of a photon of wavelength $\lambda$ = 480 nm? (Planck's constant h = 6.626 * 10^-34 J·s)

Calculate the photon energy for light of wavelength 500 nm. (Planck's constant h = 6.626 * 10^-34 J·s)

If a baseball, an electron, and a photon all have the same momentum, which has the longest wavelength?

The work function for a metal is 5.58 eV. What is the threshold wavelength for the photoelectric effect of incident photons?

When a surface is illuminated with light of wavelength 500 nm, the maximum speed of the photoelectrons is 300 km/s. When the same surface is illuminated by light of half this wavelength what is the maximum speed of the photoelectrons in this case?

The maximum kinetic energy of photoelectrons produced in the photoelectric effect depends directly on the

A gamma-ray photon is back scattered at an angle of 180° after a collision with an electron. If the scattered photon has energy 150 keV, what was the energy of the initial photon?

Which of the following statements about Maxwell's theory of electromagnetism is false?

The speed of an electron whose de Broglie wavelength is 0.0010 m is approximately

For the top magnetic lens, the direction of the magnetic field needed to deflect the electrons is

A particle is in the ground state of an infinite square-well potential. The probability of finding the particle in the region 0 < x < L/3 is

In Young's experiment,

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

Exam 14: Wave Particle Duality and Quantum Physics

Which of the following statements concerning particles and waves is/are correct?

What is the momentum (in SI units) of a photon of wavelength λ\lambdaλ = 480 nm? (Planck's constant h = 6.626 * 10-34 J·s)

Calculate the photon energy for light of wavelength 500 nm. (Planck's constant h = 6.626 * 10-34 J·s)

If a baseball, an electron, and a photon all have the same momentum, which has the longest wavelength?

The work function for a metal is 5.58 eV. What is the threshold wavelength for the photoelectric effect of incident photons?

When a surface is illuminated with light of wavelength 500 nm, the maximum speed of the photoelectrons is 300 km/s. When the same surface is illuminated by light of half this wavelength what is the maximum speed of the photoelectrons in this case?

The maximum kinetic energy of photoelectrons produced in the photoelectric effect depends directly on the

A gamma-ray photon is back scattered at an angle of 180° after a collision with an electron. If the scattered photon has energy 150 keV, what was the energy of the initial photon?

Which of the following statements about Maxwell's theory of electromagnetism is false?

The speed of an electron whose de Broglie wavelength is 0.0010 m is approximately

For the top magnetic lens, the direction of the magnetic field needed to deflect the electrons is

A particle is in the ground state of an infinite square-well potential. The probability of finding the particle in the region 0 < x < L/3 is

In Young's experiment,

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

What is the momentum (in SI units) of a photon of wavelength $\lambda$ = 480 nm? (Planck's constant h = 6.626 * 10^-34 J·s)

Calculate the photon energy for light of wavelength 500 nm. (Planck's constant h = 6.626 * 10^-34 J·s)