Question

a) A photon with a wavelength of 3.00x10^{-7} m strikes
an electron at rest. The scattered photon has a wavelength of
4.00x10^{-7} m. Calculate the KE of the electron.

b) Light with a wavelength of 425 nm falls on a photoelectric surface that has a work function of 2.00 eV. What is the maximum speed of the ejected electron?

c) A photon of wavelength 43 nm is incident upon a metal in a photoelectric apparatus. A stopping voltage of 21 V is measured. What is the threshold frequency of the metal?

Answer #1

Thanks you

A photon of wavelength 0.04320 nm strikes a free electron and is
scattered at an angle of 37.0 ? from its original direction. Find
the change in energy of the photon. Is the change in energy of the
photon a loss or a gain ? Find the energy gained by the electron.
please do it in eV

a) A photoelectric surface has a work function of 3.30 x 10-19
J. What is the threshold frequency of this surface? (format of a.bc
x 10de Hz)
b) What is the stopping voltage of an electron that has 5.40 x
10-19 J of kinetic energy? (3 digit answer)
c) A photoelectric surface requires a light of maximum
wavelength of 675 nm to cause electron emission. What is the work
function (in eV) of this surface? (3 digit answer)
d) A...

A photon with a wavelength of 2.47 nm strikes a surface and
emits an electron with kinetic energy of 228 eV (electron volts).
What is the binding energy of the electron in J? Round your answer
to 2 sig figs. 1 electron volt = 1.602 x 10-19 J

When ultraviolet light with a wavelength of 262 nm falls upon a
clean metal surface, the stopping potential necessary to terminate
the emission of photoelectrons is 0.172 V .What is the
photoelectric threshold wavelength for this metal? What is the work
function for the metal?

A photon with wavelength 0.1365 nm scatters from an electron
that is initially at rest.
What must be the angle between the direction of propagation of
the incident and scattered photons if the speed of the electron
immediately after the collision is 8.10×106 m/s ?
ϕ = ____ (units)

A) Within a photoelectric effect experiment, light shines on the
surface of a metal plate and the stopping voltage is
measured.
a) If the light intensity is decreased, what happens to the
stopping voltage?
decreases
increases
stays the same
not enough information
b) If the light intensity is decreased, what happens to the number
of electrons emitted?
decreases
increases
stays the same
not enough information
c) If the light wavelength is decreased, what happens to the KE of
the emitted...

An X-ray photon of wavelength 0.989 nm strikes the surface of a
material. The emitted photoelectron has a speed of 1.85 × 107 m s–1
. What is the binding energy of the electron in a.) eV
and b.) kJ/mol?

A photon scatters off a free electron. The wavelength of the
incident photon is 27.6 ✕ 10−4 nm. The electron recoils
with a kinetic energy that is 0.87 times the energy of the
scattered photon. Determine the scattering angle.

Light with a wavelength of 425 nm falls on a photoelectric surface
that has a work function of 2.00 eV. What is the maximum speed of
any emitted photoelectrons?

An X-ray photon is scattered at an angle of = 180.0°
from an electron that is initially at rest. After scattering, the
electron has a speed of 4.80 × 106 m/s. Find the
wavelength of the incident X-ray photon.

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