Question

Photons with a wavelength of 440 nm illuminate a metal
surface. There is also a uniform magnetic field of 25 ?T in the
region. Thus, electrons ejected from the metal are bent into
circular arcs with radii ranging from essentially zero up to a
maximum radius of 12 cm.

a) What is the maximum kinetic energy of electrons ejected
from the metal (in eV)?

b) What is the work function of the metal (in eV)?

c) What wavelength of light would result in a maximum radius
for the circular arcs of 48 cm?

Answer #1

Photons with a wavelength of 440 nm illuminate a metal
surface. There is also a uniform magnetic field of 25 ?T in the
region. Thus, electrons ejected from the metal are bent into
circular arcs with radii ranging from essentially zero up to a
maximum radius of 24 cm.
a) What is the maximum kinetic energy of electrons ejected
from the metal (in eV)?
b) What is the work function of the metal (in eV)?
c) What wavelength of light...

You illuminate a metal with light of wavelength 590 nm and find
that the photoelectrons have a maximum kinetic energy of 0.70 eV.
You then illuminate the same metal with light of another wavelength
and find a maximum kinetic energy of 1.9 eV for the
photoelectrons.
What is the second wavelength, in nanometers?

Light of wavelength 342 nm shines on a metal surface and the
stopping potential V0 in a photoelectric experiment is observed to
be 0.850 V.
a) What is the work function φ of the metal? (eV)
b) What is the maximum kinetic energy of the ejected electrons
(in Joules)?
c) What is the longest wavelength light that will still allow
electrons to escape the metal?(nm)

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?

If photons with a wavelength of 23.7 nm hits a metal surface
with a binding energy of 496 kJ/mol, what would be the MOST LIKELY
speed of the ejected electrons?
Does anyone know how to go about solving this? I'm kind of not
sure how to even start.

Photoelectrons are
observed when a metal surface is illuminated by light with a
wavelength 437 nm. The stopping potential for the photoelectrons in
this experiment is 1.67V.
a. What is the work
function of the metal, in eV?
b. What type of metal
is used in this experiment?
c. What is the maximum
speed of the ejected electrons?

2a) When a metal surface is illuminated by light of wavelength
310 nm, the
measured maximum kinetic energy of the emitted electrons is 0.50
eV. Calculate the
metal plate’s work function φ in units of eV.
b) In the rest frame of an ejected electron from the photoelectric
experiment in part a),
an incident γ-ray with an energy of 0.25 MeV interacts with the
electron. Following
the collision, the γ-ray has a final energy of 0.1 MeV. Calculate
the angle...

A) You are setting up a photoelectric effect experiment with an
unknown metal surface.
Which of the following wavelengths of light is most likely to
cause electrons to be ejected from the surface?
700 nm
they are all equally likely to work
500 nm
300 nm
900 nm
B) Suppose you try the experiment with the light you chose in
the previous question, and you get ejected electrons with a maximum
kinetic energy of 2.5 eV. What will happen if...

Photons with a frequency of 5.6*10^14 s-1 are required to eject
electrons from potassium metal. what is the kinetic energy of the
ejected electrons when 450 nm photons shine on the metal?

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