Question

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)

Answer #1

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...

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?

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...

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...

When light with a wavelength of 221 nm is incident on a certain
metal surface, electrons are ejected with a maximum kinetic energy
of 3.28 × 10−19 J. Determine the wavelength (in nm) of
light that should be used to double the maximum kinetic energy of
the electrons ejected from this surface.

A) Light of frequency 9.13 x 10^14 s-1 shines on the surface of
a certain metal, Metal X. if the ejected electrons have a velocity
of 6.13x10^5 m/s, what is the work function (binding energy) of
Metal X?
B) What is the longest wavelength of light (in nm) that can be
used to eject electrons from the surface of Metal X?
C) A different metal, Metal Y, has smaller binding energy. If
the same frequency of light from Part A...

The stopping potential for electrons emitted from a surface
illuminated by light of wavelength 567 nm is 0.932 V. When the
incident wavelength is changed to a new value, the stopping
potential is 2.00 V.
(a) What is this new wavelength?
(b) What is the work function for the surface

The stopping potential for electrons emitted from a surface
illuminated by light of wavelength 500 nm is 0.770 V. When the
incident wavelength is changed to a new value, the stopping
potential is 1.40 V. (a) What is this new
wavelength? (b) What is the work function for the
surface?

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...

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...

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