Question

A. What is the energy in 10^{-3} eV of a photon that has
a momentum of 6.13×10^{−29} kg ⋅ m/s ?

B. What is the energy in 10^{-9} eV of a photon in a
radio wave from an AM station that has a 1,506 kHz broadcast
frequency?

C. Calculate the frequency in 10^{20} Hz of a 0.571 MeV
γ-ray photon.

D. A certain molecule oscillates with a frequency of
1.73×10^{13} Hz. What is the approximate value of
*n* for a state having an energy of 1.0 eV? Hint: use
appropriate rounding for quantized states.

E. What is the wavelength of an electron moving at 2.82% of the speed of light? Give your answer in picometers.

F. What is the binding energy in eV of electrons in a certain material if the longest-wavelength photon that can eject electrons is 350 nm?

G. UV radiation having a wavelength of 103 nm falls on a metal, to which electrons are bound by 3.2 eV. What is the maximum kinetic energy of the ejected photoelectrons?

H. What power, is dissipated in 56.9 μs by 0.68×10^{15}
electrons ejected from a material by 79 nm photons, if they are
bound to the material by 4.23 eV?

Answer #1

The work function of an element is 3.2 eV. Photons of a certain
energy are found to eject electrons with a kinetic energy of 6.5
eV.
(a) What is the speed of the ejected electrons?
(c) If the photon energy is increased by a factor of two, what
is the kinetic energy of the ejected electrons?
(b) What is the photon frequency?
(Please make numbers legible and with units)

a) What is the energy of a photon (in eV) that has a wavelength
of 466 nm? (3 digit answer)
b) What is the energy (in eV) of a photon that has a wavelength
of 460 nm?
c) What is the wavelength of a photon that has 2.1 eV of kinetic
energy? (format of a.b x 10-c m )
d) a photoelectric surface has a work function of 2.00 eV. What
is the threshold frequency of this surface? (format of
a.bc...

a) A photon of wavelength 43 nm is incident upon a metal in a
photoelectric apparatus. A stopping voltage of 21 V was obtained.
What is the threshold frequency of the metal? (format of a.b x
10cdHz)
b) Light with a frequency of 5.00 x 1014 Hz
illuminates a photoelectric surface that has a work function of
2.10 x 10-19 J. What is the maximum kinetic energy of
the emitted photoelectrons? (format of a.bc x 10-de J
)
c) Light...

UV radiation having a wavelength of 125 nm falls on gold metal,
to which electrons are bound by 4.82 eV. What is the maximum
kinetic energy of the ejected photoelectrons?

A certain metal has a work function of 2.6 eV. (a) What is the
shortest wavelength of the electromagnetic radiation that will
eject electrons from this material? (b) If light of wavelength 420
nm is used, what will be the speed of the emitted electrons?

A(n) x-ray photon has a wavelength of 7.80 ✕ 10−9 cm. Find the
momentum, the frequency, and the energy of the photon in electron
volts. (a) the momentum kg · m/s (b) the frequency Hz (c) the
energy of the photon in electron volts eV Im having trouble. please
help

1. What is the energy in eV and wavelength in µm of a photon
that, when absorbed by a hydrogen atom, could cause a transition
from the n= 4 to the n= 8
energy level?
a) energy in eV
b) wavelength in µm
2. The so-called Lyman-αphoton is the lowest energy photon in
the Lyman series of hydrogen and results from an electron
transitioning from the n= 2 to the n= 1 energy level. Determine the
energy in eV and...

If the work function of a material is 2.20 eV, what frequency of
incident light would give a maximum kinetic energy of 0.25 eV to
the photoelectrons ejected from the surface of this material? (1 eV
= 1.60 × 10-19 J, h = 6.626 × 10-34 J ∙ s)
5.92 × 1014 Hz
3.53 × 1014 Hz
1.02 × 1014 Hz
2.50 × 1014 Hz
2.05 × 1014 Hz

The work function for aluminum is 4.2 eV. (a) What is the cutoff
frequency of light
incident on an aluminum target that releases photoelectrons from
its surface? (b) Find the
corresponding cutoff wavelength. (c) If photons of energy 5.0 eV
are incident on an
aluminum target what is the maximum kinetic energy of the ejected
photoelectrons? (d)
what is the maximum velocity of a photoelectron traveling from the
anode to the cathode
of a photocell? (d) If a blue beam...

What is the kinetic energy in eV of an electron whose de Broglie
wavelength is 18 % of the wavelength of a photon having the energy
equal to electrons kinetic energy?
Answer in eV

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