Question 1

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.

Accepted Answer

A) 1.5 × 10³ m/s 
B) 1.9 × 10³ m/s 
C) 2.1 × 10³ m/s 
D) 2.3 × 10³ m/s 
E) 2.9 × 10³ m/s 
A) 1.5 × 10³ m/s 
B) 1.9 × 10³ m/s 
C) 2.1 × 10³ m/s 
D) 2.3 × 10³ m/s 
E) 2.9 × 10³ m/s

Question 2

A digital wireless telephone communicates to a base via microwaves with a frequency of 1930 MHz.What are the momentum and energy for the microwave photons emitted by the telephone?

Accepted Answer

The answer of A digital wireless telephone communicates to a...

Question 3

A photon of wavelength 200 nm is scattered by an electron that is initially at rest.Which one of the following statements concerning the wavelength of the scattered photon is true?

Accepted Answer

A) The wavelength is zero nm. 
B) The wavelength is 200 nm. 
C) The wavelength is 100 nm. 
D) The wavelength is greater than 200 nm. 
E) The wavelength is less than 200 nm,but greater than zero. 
A) The wavelength is zero nm. 
B) The wavelength is 200 nm. 
C) The wavelength is 100 nm. 
D) The wavelength is greater than 200 nm. 
E) The wavelength is less than 200 nm,but greater than zero.

Question 4

The Hubble Space Telescope has an orbital speed of 7.56 × 10³ m/s and a mass of 11 600 kg.What is the de Broglie wavelength of the telescope?

Accepted Answer

A) 8.77 × 10⁷ m 
B) 5.81 × 10-²⁶ m 
C) 6.63 × 10-³⁴ m 
D) 3.78 × 10-⁴⁰ m 
E) 7.56 × 10-⁴² m 
A) 8.77 × 10⁷ m 
B) 5.81 × 10-²⁶ m 
C) 6.63 × 10-³⁴ m 
D) 3.78 × 10-⁴⁰ m 
E) 7.56 × 10-⁴² m

Question 5

What happens to the de Broglie wavelength of an electron if its momentum is reduced to one-half of its initial value?

Accepted Answer

A) The wavelength decreases by a factor of 4. 
B) The wavelength increases by a factor of 4. 
C) The wavelength increases by a factor of 3. 
D) The wavelength increases by a factor of 2. 
E) The wavelength decreases by a factor of 2. 
A) The wavelength decreases by a factor of 4. 
B) The wavelength increases by a factor of 4. 
C) The wavelength increases by a factor of 3. 
D) The wavelength increases by a factor of 2. 
E) The wavelength decreases by a factor of 2.

Question 6

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

Question 7

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?

Accepted Answer

A) No electrons will be emitted. 
B) Electrons will be emitted with a maximum kinetic energy of 3 eV. 
C) Electrons will be emitted with a maximum kinetic energy of 6 eV. 
D) Electrons will be emitted with a maximum kinetic energy of 9 eV. 
E) Electrons will be emitted with a maximum kinetic energy of 12 eV. 
A) No electrons will be emitted. 
B) Electrons will be emitted with a maximum kinetic energy of 3 eV. 
C) Electrons will be emitted with a maximum kinetic energy of 6 eV. 
D) Electrons will be emitted with a maximum kinetic energy of 9 eV. 
E) Electrons will be emitted with a maximum kinetic energy of 12 eV.

Question 8

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 J 
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 J

Question 9

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

Question 10

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

Accepted Answer

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

Question 11

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.

Accepted Answer

A) 4.31 × 10-¹² m 
B) 5.56 × 10-¹² m 
C) 6.07 × 10-¹² m 
D) 6.62 × 10-¹² m 
E) 7.85 × 10-¹² m 
A) 4.31 × 10-¹² m 
B) 5.56 × 10-¹² m 
C) 6.07 × 10-¹² m 
D) 6.62 × 10-¹² m 
E) 7.85 × 10-¹² m

Question 12

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

Question 13

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. 
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.

Question 14

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 shorter 
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 shorter

Question 15

Which type of wave motion does not involve photons?

Accepted Answer

A) gamma rays 
B) microwaves 
C) radio waves 
D) infrared radiation 
E) sound waves 
A) gamma rays 
B) microwaves 
C) radio waves 
D) infrared radiation 
E) sound waves

Question 16

What is the de Broglie wavelength of an electron (m = 9.11 × 10-³¹ kg)in a 2.5 × 10³-volt X-ray tube?

Accepted Answer

A) 0.0072 nm 
B) 0.011 nm 
C) 0.017 nm 
D) 0.031 nm 
E) 0.025 nm 
A) 0.0072 nm 
B) 0.011 nm 
C) 0.017 nm 
D) 0.031 nm 
E) 0.025 nm

Question 17

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 Hz 
A) 7.3 × 10¹⁴ Hz 
B) 1.2 × 10¹⁵ Hz 
C) 3.8 × 10¹⁷ Hz 
D) 6.5 × 10¹⁵ Hz 
E) 4.6 × 10¹⁴ Hz

Question 18

In the Compton scattering experiment shown in the figure,a monochromatic beam of X-rays strikes a target containing free electrons.Scattered X-rays are detected with a wavelength of 2.50 × 10-¹² m at an angle of 45° away from the original beam direction.What is the wavelength of the incident monochromatic X-rays? Note: The mass of an electron is 9.11 × 10-³¹ kg.

Accepted Answer

A) 3.21 × 10-¹² m 
B) 2.86 × 10-¹² m 
C) 2.50 × 10-¹² m 
D) 2.03 × 10-¹² m 
E) 1.79 × 10-¹² m 
A) 3.21 × 10-¹² m 
B) 2.86 × 10-¹² m 
C) 2.50 × 10-¹² m 
D) 2.03 × 10-¹² m 
E) 1.79 × 10-¹² m

Question 19

White light consisting of wavelengths 380 nm   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?

Accepted Answer

A) 380 nm   750 nm 
B) 380 nm   nm 
C) 380 nm   540 nm 
D) 380 nm   410 nm 
E) No photoelectrons will be emitted. 
A) 380 nm   750 nm 
B) 380 nm   nm 
C) 380 nm   540 nm 
D) 380 nm   410 nm 
E) No photoelectrons will be emitted.

Question 20

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

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.

A digital wireless telephone communicates to a base via microwaves with a frequency of 1930 MHz.What are the momentum and energy for the microwave photons emitted by the telephone?

A photon of wavelength 200 nm is scattered by an electron that is initially at rest.Which one of the following statements concerning the wavelength of the scattered photon is true?

The Hubble Space Telescope has an orbital speed of 7.56 × 10³ m/s and a mass of 11 600 kg.What is the de Broglie wavelength of the telescope?

What happens to the de Broglie wavelength of an electron if its momentum is reduced to one-half of its initial value?

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?

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?

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.

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.

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

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?

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?

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?

Which type of wave motion does not involve photons?

What is the de Broglie wavelength of an electron (m = 9.11 × 10^-³¹ kg)in a 2.5 × 10³-volt X-ray tube?

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

White light consisting of wavelengths 380 nm 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 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?

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

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.

A digital wireless telephone communicates to a base via microwaves with a frequency of 1930 MHz.What are the momentum and energy for the microwave photons emitted by the telephone?

A photon of wavelength 200 nm is scattered by an electron that is initially at rest.Which one of the following statements concerning the wavelength of the scattered photon is true?

The Hubble Space Telescope has an orbital speed of 7.56 × 10³ m/s and a mass of 11 600 kg.What is the de Broglie wavelength of the telescope?

What happens to the de Broglie wavelength of an electron if its momentum is reduced to one-half of its initial value?

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?

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?

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.

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.

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

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?

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?

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?

Which type of wave motion does not involve photons?

What is the de Broglie wavelength of an electron (m = 9.11 × 10-³¹ kg)in a 2.5 × 10³-volt X-ray tube?

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

White light consisting of wavelengths 380 nm 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 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?

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

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.

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.

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.

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

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?

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?

What is the de Broglie wavelength of an electron (m = 9.11 × 10^-³¹ kg)in a 2.5 × 10³-volt X-ray tube?

White light consisting of wavelengths 380 nm 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?