2026 TESU Physics 116 Final Exam New Latest Version
with All the Questions and answers
A 30-year-old astronaut goes off on a long-term mission in a spacecraft that travels at speeds close to
that of light. The mission lasts exactly 20 years as measured on Earth. Biologically speaking, at the end of
the mission, the astronaut's age would be - -answer-less than 50 years
A really high-speed train moves in a direction parallel to its length with a speed that approaches the
speed of light. The height of the train, as measured by a stationary observer on the ground, - -answer-
does not change due to motion
A really high-speed train moves in a direction parallel to its length with a speed that approaches the
speed of light. The length of the train, as measured by a stationary observer on the ground, - -answer-
decreases due to motion
Two sources emit beams of microwaves. The microwaves from source A have a frequency of 10 GHz,
and the ones from source B have a frequency of 20 GHz. This is all we know about the two beams.
Which of the following statements about these beams are correct? - -answer-A photon in beam B has
twice the energy of a photon in beam A
Two sources emit beams of light of wavelength 550 nm. The light from source A has an intensity of 10
μW/m2, and the light from source B has an intensity of 20 μW/m2. This is all we know about the two
beams. Which of the following statements about these beams are correct? - -answer-Beam B carries
twice as many photons per second as beam A & A photon in beam B has the same energy as a photon in
beam A
A blue laser beam is incident on a metallic surface, causing electrons to be ejected from the metal. If the
frequency of the laser beam is increased while the intensity of the beam is held fixed, - -answer-the rate
of ejected electrons will decrease and their maximum kinetic energy will increase
, Monochromatic light falls on a metal surface and electrons are ejected. If the intensity of the light is
increased, what will happen to the ejection rate and maximum energy of the electrons? - -answer-
greater rate; same maximum energy
If the wavelength of a photon in vacuum is the same as the de Broglie wavelength of an electron, which
one is traveling faster through space? - -answer-The photon because photons always travel through
space faster than electrons
If a proton and an electron have the same speed, which one has the longer de Broglie wavelength? - -
answer-the electron
Which of the following actions will increase the de Broglie wavelength of a speck of dust? - -answer-
Decrease its mass, Decrease its speed, Decrease its momentum
Protons are being accelerated in a particle accelerator. When the energy of the protons is doubled, their
de Broglie wavelength will - -answer-decrease by a factor of sqrt(2)
A proton and an electron are both accelerated to the same final kinetic energy. If λp is the de Broglie
wavelength of the proton and λe is the de Broglie wavelength of the electron, then - -answer-λp<λe
To which of the following values of n does the longest wavelength in the Balmer series correspond? - -
answer-3
To which of the following values of n does the shortest wavelength in the Balmer series correspond? - -
answer-infinity (very large)
The energy difference between adjacent orbit radii in a hydrogen atom - -answer-decreases with
increasing values of n
The energy spacing between levels 1 and 2 is twice that between 2 and 3. If an electron makes a
transition from level 3 to level 2, the radiation of wavelength λ is emitted. What possible radiation
wavelengths might be produced by other transitions between the three energy levels? - -answer-both
λ/2 and λ/3
with All the Questions and answers
A 30-year-old astronaut goes off on a long-term mission in a spacecraft that travels at speeds close to
that of light. The mission lasts exactly 20 years as measured on Earth. Biologically speaking, at the end of
the mission, the astronaut's age would be - -answer-less than 50 years
A really high-speed train moves in a direction parallel to its length with a speed that approaches the
speed of light. The height of the train, as measured by a stationary observer on the ground, - -answer-
does not change due to motion
A really high-speed train moves in a direction parallel to its length with a speed that approaches the
speed of light. The length of the train, as measured by a stationary observer on the ground, - -answer-
decreases due to motion
Two sources emit beams of microwaves. The microwaves from source A have a frequency of 10 GHz,
and the ones from source B have a frequency of 20 GHz. This is all we know about the two beams.
Which of the following statements about these beams are correct? - -answer-A photon in beam B has
twice the energy of a photon in beam A
Two sources emit beams of light of wavelength 550 nm. The light from source A has an intensity of 10
μW/m2, and the light from source B has an intensity of 20 μW/m2. This is all we know about the two
beams. Which of the following statements about these beams are correct? - -answer-Beam B carries
twice as many photons per second as beam A & A photon in beam B has the same energy as a photon in
beam A
A blue laser beam is incident on a metallic surface, causing electrons to be ejected from the metal. If the
frequency of the laser beam is increased while the intensity of the beam is held fixed, - -answer-the rate
of ejected electrons will decrease and their maximum kinetic energy will increase
, Monochromatic light falls on a metal surface and electrons are ejected. If the intensity of the light is
increased, what will happen to the ejection rate and maximum energy of the electrons? - -answer-
greater rate; same maximum energy
If the wavelength of a photon in vacuum is the same as the de Broglie wavelength of an electron, which
one is traveling faster through space? - -answer-The photon because photons always travel through
space faster than electrons
If a proton and an electron have the same speed, which one has the longer de Broglie wavelength? - -
answer-the electron
Which of the following actions will increase the de Broglie wavelength of a speck of dust? - -answer-
Decrease its mass, Decrease its speed, Decrease its momentum
Protons are being accelerated in a particle accelerator. When the energy of the protons is doubled, their
de Broglie wavelength will - -answer-decrease by a factor of sqrt(2)
A proton and an electron are both accelerated to the same final kinetic energy. If λp is the de Broglie
wavelength of the proton and λe is the de Broglie wavelength of the electron, then - -answer-λp<λe
To which of the following values of n does the longest wavelength in the Balmer series correspond? - -
answer-3
To which of the following values of n does the shortest wavelength in the Balmer series correspond? - -
answer-infinity (very large)
The energy difference between adjacent orbit radii in a hydrogen atom - -answer-decreases with
increasing values of n
The energy spacing between levels 1 and 2 is twice that between 2 and 3. If an electron makes a
transition from level 3 to level 2, the radiation of wavelength λ is emitted. What possible radiation
wavelengths might be produced by other transitions between the three energy levels? - -answer-both
λ/2 and λ/3
