PHYSICS FINAL EXAM CH 27-29 2025
ORGANIZED QUESTIONS,STEP BY
STEP EXPLANATIONS AND REVIEW
GUIDE AND 100% CORRECT EXPERT
VERIFIED ANSWERS GRADED A+
(BRAND NEW!!!!!!!!!)
What happens to the de Broglie wavelength of an electron
if its momentum is doubled?
(a) The wavelength decreases by a factor of 4.
(b) The wavelength increases by a factor of 2.
(c) The wavelength increases by a factor of 4.
(d) The wavelength decreases by a factor of 2
(e) The wavelength increases by a factor of 3. - THE CORRECT
ANSWER-if an electron has its momentum doubled, the de Broglie
wavelength DECREASES BY A FACTOR OF 2
Determine the de Broglie wavelength of a neutron (m=1.67×10-
27kg) that has a speed of 5.0 m/s.
(a) 79 nm
(b) 395 nm
(c) 1975 nm
(d) 162 nm
,(e) 529 nm - THE CORRECT ANSWER-79 nm
Upon which of the following parameters does the energy of a
photon depend? - THE CORRECT ANSWER-frequency
For which of the following problems did Max Planck make
contributions that eventually led to the development of the
quantum hypothesis? - THE CORRECT ANSWER-blackbody radiation
curves
Light is usually thought of as wave-like in nature and electrons
as particle-like. In which one of the following activities does
light behave as a particle or does an electron behave as a wave?
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 its boiling point in a microwave oven.
D)An electron enters a parallel plate capacitor and is deflected
downward.
E)A beam of electrons is diffracted as it passes through a
narrow slit. - THE CORRECT ANSWER-A beam of electrons is diffracted
as it passes through a narrow slit.
Upon which one of the following parameters does the energy of
a photon depend?
A)mass
B)amplitude
, C)polarization
D)frequency
E)phase relationships - THE CORRECT ANSWER-FREQUENCY
For which one of the following problems did Max Planck make
contributions that eventually led to the development of the
"quantum" hypothesis?
A)photoelectric effect
B)uncertainty principle
C) blackbody radiation curves
D)he motion of the earth in the ether
E)the invariance of the speed of light through vacuum - THE
CORRECT ANSWER-blackbody radiation curves
Determine the energy of a single photon in a beam of light of
wavelength 450 nm. - THE CORRECT ANSWER-2.8 eV
A laser emits a single, 2.0-ms pulse of light that has a frequency
of 2.83 ´ 1011 Hz and a total power of 75 000 W. How many
photons are in the pulse? - THE CORRECT ANSWER-8.0x10^23
A laser emits a pulse of light with energy 5000 J. Determine the
number of photons in the pulse if the wavelength of light is 480
nm. - THE CORRECT ANSWER-1.2x10^22
A laser emits photons of energy 2.5 eV with a power of 10-3 W.
How many photons are emitted in one second? - THE CORRECT
ANSWER-2.5x10^15
ORGANIZED QUESTIONS,STEP BY
STEP EXPLANATIONS AND REVIEW
GUIDE AND 100% CORRECT EXPERT
VERIFIED ANSWERS GRADED A+
(BRAND NEW!!!!!!!!!)
What happens to the de Broglie wavelength of an electron
if its momentum is doubled?
(a) The wavelength decreases by a factor of 4.
(b) The wavelength increases by a factor of 2.
(c) The wavelength increases by a factor of 4.
(d) The wavelength decreases by a factor of 2
(e) The wavelength increases by a factor of 3. - THE CORRECT
ANSWER-if an electron has its momentum doubled, the de Broglie
wavelength DECREASES BY A FACTOR OF 2
Determine the de Broglie wavelength of a neutron (m=1.67×10-
27kg) that has a speed of 5.0 m/s.
(a) 79 nm
(b) 395 nm
(c) 1975 nm
(d) 162 nm
,(e) 529 nm - THE CORRECT ANSWER-79 nm
Upon which of the following parameters does the energy of a
photon depend? - THE CORRECT ANSWER-frequency
For which of the following problems did Max Planck make
contributions that eventually led to the development of the
quantum hypothesis? - THE CORRECT ANSWER-blackbody radiation
curves
Light is usually thought of as wave-like in nature and electrons
as particle-like. In which one of the following activities does
light behave as a particle or does an electron behave as a wave?
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 its boiling point in a microwave oven.
D)An electron enters a parallel plate capacitor and is deflected
downward.
E)A beam of electrons is diffracted as it passes through a
narrow slit. - THE CORRECT ANSWER-A beam of electrons is diffracted
as it passes through a narrow slit.
Upon which one of the following parameters does the energy of
a photon depend?
A)mass
B)amplitude
, C)polarization
D)frequency
E)phase relationships - THE CORRECT ANSWER-FREQUENCY
For which one of the following problems did Max Planck make
contributions that eventually led to the development of the
"quantum" hypothesis?
A)photoelectric effect
B)uncertainty principle
C) blackbody radiation curves
D)he motion of the earth in the ether
E)the invariance of the speed of light through vacuum - THE
CORRECT ANSWER-blackbody radiation curves
Determine the energy of a single photon in a beam of light of
wavelength 450 nm. - THE CORRECT ANSWER-2.8 eV
A laser emits a single, 2.0-ms pulse of light that has a frequency
of 2.83 ´ 1011 Hz and a total power of 75 000 W. How many
photons are in the pulse? - THE CORRECT ANSWER-8.0x10^23
A laser emits a pulse of light with energy 5000 J. Determine the
number of photons in the pulse if the wavelength of light is 480
nm. - THE CORRECT ANSWER-1.2x10^22
A laser emits photons of energy 2.5 eV with a power of 10-3 W.
How many photons are emitted in one second? - THE CORRECT
ANSWER-2.5x10^15
