Question 1

Which one of the following statements concerning photons is false?

Accepted Answer

A) Photons have zero mass. 
B) The rest energy of all photons is zero. 
C) Photons travel at the speed of light in a vacuum. 
D) Photons have been brought to rest by applying a very strong magnetic field to them. 
E) The energy of a photon is proportional to its frequency. 
A) Photons have zero mass. 
B) The rest energy of all photons is zero. 
C) Photons travel at the speed of light in a vacuum. 
D) Photons have been brought to rest by applying a very strong magnetic field to them. 
E) The energy of a photon is proportional to its frequency. D

Question 2

For which one of the following problems did Max Planck make contributions that eventually led to the development of the "quantum" hypothesis?

Accepted Answer

A) photoelectric effect 
B) uncertainty principle 
C) blackbody radiation curves 
D) the motion of the earth in the ether 
E) the invariance of the speed of light in a vacuum 
A) photoelectric effect 
B) uncertainty principle 
C) blackbody radiation curves 
D) the motion of the earth in the ether 
E) the invariance of the speed of light in a vacuum C

Question 3

Determine the energy of a single photon in a monochromatic beam of light of wavelength 625 nm.

Accepted Answer

A) 1.99 eV 
B) 2.08 eV 
C) 2.32 eV 
D) 3.49 eV 
E) 4.77 eV 
A) 1.99 eV 
B) 2.08 eV 
C) 2.32 eV 
D) 3.49 eV 
E) 4.77 eV A

Question 4

A beam of electrons is incident on a single slit that has a width of 1.00 × 10-⁶ m and a diffraction pattern is observed on a screen located 15.0 m from the slit.The momentum of an individual electron in the beam is 5.91 × 10-²⁴ kg × m/s.What is the width of the central maximum fringe?

Accepted Answer

A) 5.87 × 10-⁵ m 
B) 1.33 × 10-⁴ m 
C) 6.67 × 10-⁴ m 
D) 3.37 × 10-³ m 
E) 7.50 × 10-³ m 
A) 5.87 × 10-⁵ m 
B) 1.33 × 10-⁴ m 
C) 6.67 × 10-⁴ m 
D) 3.37 × 10-³ m 
E) 7.50 × 10-³ m

Question 5

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 × 10S1U1P1-S1S1P0³¹ kg.
-Suppose it is desired to observe diffraction effects for a beam of electromagnetic radiation using the same grating.Roughly,what is the required energy of the individual photons in the beam?

Accepted Answer

A) 10-⁶ eV 
B) 10-⁴ eV 
C) 10-² eV 
D) 10² eV 
E) 10⁴ eV 
A) 10-⁶ eV 
B) 10-⁴ eV 
C) 10-² eV 
D) 10² eV 
E) 10⁴ eV

Question 6

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:   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 C 
A) A only 
B) B only 
C) A and B 
D) B and C 
E) A,B,and C

Question 7

Photons of energy 5.0 eV strike a metal surface that has a work function of 3.5 eV.Determine which one of the following best describes the kinetic energy of the emitted electrons.

Accepted Answer

A) 1.5 eV or less 
B) 1.5 eV or more,but less than 2.5 eV 
C) 2.5 eV or more,but less than 3.5 eV 
D) 3.5 eV or more 
E) 3.5 eV or less,but more than 1.5 eV 
A) 1.5 eV or less 
B) 1.5 eV or more,but less than 2.5 eV 
C) 2.5 eV or more,but less than 3.5 eV 
D) 3.5 eV or more 
E) 3.5 eV or less,but more than 1.5 eV

Question 8

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. 
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.

Question 9

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

Question 10

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 m 
A) 0.032 m 
B) 0.065 m 
C) 0.13 m 
D) 0.25 m 
E) 0.50 m

Question 11

The speed of a bullet with a mass of 0.050 kg is 420 m/s with an uncertainty of 0.010 %.What is the minimum uncertainty in the bullet's position if it is measured at the same time as the speed is measured?

Accepted Answer

A) 2.5 × 10-³¹ m 
B) 5.0 × 10-³² m 
C) 7.5 × 10-³³ m 
D) 2.5 × 10-³⁴ m 
E) 6.0 × 10-³⁶ m 
A) 2.5 × 10-³¹ m 
B) 5.0 × 10-³² m 
C) 7.5 × 10-³³ m 
D) 2.5 × 10-³⁴ m 
E) 6.0 × 10-³⁶ m

Question 12

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?

Accepted Answer

A) A Young's double slit experiment is conducted using blue light. 
B) X-rays are used to examine the crystal structure of sodium chloride. 
C) Water is heated to 99.0 ᵒC in a microwave oven. 
D) An electron enters a parallel plate capacitor,which deflects the electron downward. 
E) A beam of electrons is diffracted as it passes through a narrow slit. 
A) A Young's double slit experiment is conducted using blue light. 
B) X-rays are used to examine the crystal structure of sodium chloride. 
C) Water is heated to 99.0 ᵒC in a microwave oven. 
D) An electron enters a parallel plate capacitor,which deflects the electron downward. 
E) A beam of electrons is diffracted as it passes through a narrow slit.

Question 13

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

Question 14

A laser emits a 5.0 × 10³-J pulse of light that has a wavelength of 480 nm.Determine the number of photons in the pulse.

Accepted Answer

A) 5.2 × 10¹⁶ 
B) 2.5 × 10¹⁹ 
C) 1.2 × 10²² 
D) 3.1 × 10²² 
E) 8.1 × 10²⁴ 
A) 5.2 × 10¹⁶ 
B) 2.5 × 10¹⁹ 
C) 1.2 × 10²² 
D) 3.1 × 10²² 
E) 8.1 × 10²⁴

Question 15

Approximately,what is the de Broglie wavelength of an electron that has been accelerated through a potential difference of 225 V? The mass of an electron is 9.11 × 10-³¹ kg.

Accepted Answer

A) 0.14 nm 
B) 0.082 nm 
C) 0.043 nm 
D) 0.0092 nm 
E) 0.22 nm 
A) 0.14 nm 
B) 0.082 nm 
C) 0.043 nm 
D) 0.0092 nm 
E) 0.22 nm

Question 16

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. 
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.

Question 17

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. 
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.

Question 18

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

Accepted Answer

A) The photon is absorbed completely. 
B) The photon gains energy,so the final photon has a frequency greater than f. 
C) The photon gains energy,so the final photon has a wavelength greater than  . 
D) The photon loses energy,so the final photon has a frequency less than f. 
E) The photon loses energy,so the final photon has a wavelength less  . 
A) The photon is absorbed completely. 
B) The photon gains energy,so the final photon has a frequency greater than f. 
C) The photon gains energy,so the final photon has a wavelength greater than  . 
D) The photon loses energy,so the final photon has a frequency less than f. 
E) The photon loses energy,so the final photon has a wavelength less  .

Question 19

Which one of the following phrases best describes the term work function?

Accepted Answer

A) the minimum energy required to vaporize a metal surface 
B) the work required to place a charged particle on a metal surface 
C) the minimum energy required to remove electrons from a metal surface 
D) the minimum energy required to remove an atom from a metal surface 
E) the work done by electromagnetic radiation when it hits a metal surface 
A) the minimum energy required to vaporize a metal surface 
B) the work required to place a charged particle on a metal surface 
C) the minimum energy required to remove electrons from a metal surface 
D) the minimum energy required to remove an atom from a metal surface 
E) the work done by electromagnetic radiation when it hits a metal surface

Question 20

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 × 10S1U1P1-S1S1P0³¹ 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 eV 
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 eV

Which one of the following statements concerning photons is false?

For which one of the following problems did Max Planck make contributions that eventually led to the development of the "quantum" hypothesis?

Determine the energy of a single photon in a monochromatic beam of light of wavelength 625 nm.

A beam of electrons is incident on a single slit that has a width of 1.00 × 10^-⁶ m and a diffraction pattern is observed on a screen located 15.0 m from the slit.The momentum of an individual electron in the beam is 5.91 × 10^-²⁴ kg × m/s.What is the width of the central maximum fringe?

Photons of energy 5.0 eV strike a metal surface that has a work function of 3.5 eV.Determine which one of the following best describes the kinetic energy of the emitted electrons.

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

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?

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?

The speed of a bullet with a mass of 0.050 kg is 420 m/s with an uncertainty of 0.010 %.What is the minimum uncertainty in the bullet's position if it is measured at the same time as the speed is measured?

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?

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

A laser emits a 5.0 × 10³-J pulse of light that has a wavelength of 480 nm.Determine the number of photons in the pulse.

Approximately,what is the de Broglie wavelength of an electron that has been accelerated through a potential difference of 225 V? The mass of an electron is 9.11 × 10^-³¹ kg.

Complete the following statement: The term photon applies

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

In the Compton effect,a photon of wavelength 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 phrases best describes the term work function?

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?

Fluids

The Transfer of Heat

The Ideal Gas Law and Kinetic Theory

Thermodynamics

The Principle of Linear Superposition and Interference Phenomena

Electric Circuits

Electromagnetic Induction

The Refl Ection of Light: Mirrors

The Refraction of Light: Lenses and Optical Instruments

Filters

Exam 29: Particles and Waves

Which one of the following statements concerning photons is false?

For which one of the following problems did Max Planck make contributions that eventually led to the development of the "quantum" hypothesis?

Determine the energy of a single photon in a monochromatic beam of light of wavelength 625 nm.

A beam of electrons is incident on a single slit that has a width of 1.00 × 10-⁶ m and a diffraction pattern is observed on a screen located 15.0 m from the slit.The momentum of an individual electron in the beam is 5.91 × 10-²⁴ kg × m/s.What is the width of the central maximum fringe?

Photons of energy 5.0 eV strike a metal surface that has a work function of 3.5 eV.Determine which one of the following best describes the kinetic energy of the emitted electrons.

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

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?

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?

The speed of a bullet with a mass of 0.050 kg is 420 m/s with an uncertainty of 0.010 %.What is the minimum uncertainty in the bullet's position if it is measured at the same time as the speed is measured?

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?

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

A laser emits a 5.0 × 10³-J pulse of light that has a wavelength of 480 nm.Determine the number of photons in the pulse.

Approximately,what is the de Broglie wavelength of an electron that has been accelerated through a potential difference of 225 V? The mass of an electron is 9.11 × 10-³¹ kg.

Complete the following statement: The term photon applies

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

In the Compton effect,a photon of wavelength 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 phrases best describes the term work function?

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?

Fluids

The Transfer of Heat

The Ideal Gas Law and Kinetic Theory

Thermodynamics

The Principle of Linear Superposition and Interference Phenomena

Electric Circuits

Electromagnetic Induction

The Refl Ection of Light: Mirrors

The Refraction of Light: Lenses and Optical Instruments

Filters

A beam of electrons is incident on a single slit that has a width of 1.00 × 10^-⁶ m and a diffraction pattern is observed on a screen located 15.0 m from the slit.The momentum of an individual electron in the beam is 5.91 × 10^-²⁴ kg × m/s.What is the width of the central maximum fringe?

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

Approximately,what is the de Broglie wavelength of an electron that has been accelerated through a potential difference of 225 V? The mass of an electron is 9.11 × 10^-³¹ kg.

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?