Question

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?

Answer #1

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 photoelectrons emitted from a
surface illuminated by light of wavelength 490nm is 0.70V. When the
incident wavelength is changed to a new value, the stopping
potential is found to be 1.40V. What is the work function for the
surface? What is this new wavelength?

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?

Problem: Light strikes a sodium surface, causing photoelectric
emission. The stopping potential for the ejected electrons is 5.0V,
and the work function of sodium is 2.2eV. What is the wavelength of
the incident light? Give your answer in nanometers.

A potassium surface is illuminated by a monochromatic laser
light with a wavelength of 400 nm. Determine the maximum speed of a
photoelectron emitted from this surface if the potassium surface
has a work function of 2.30 eV.
??=9.11×10^−31??
c = 3.0x10^8 m/s
h = 6.63x10^-34 js

In a photoelectric experiment it is found that a stopping
potential of 1.00 V is needed to stop all the electrons when
incident light of wavelength 262 nm is used and 2.2 V is needed for
light of wavelength 207 nm. From these data determine Planck's
constant and the work function of the metal.
eV·s?
eV?

The maximum kinetic energy of the emitted electrons is found to
be 1.255 eV when a metal surface is illuminated by light with a
wavelength of 400 nm. When the same metal surface is illuminated by
light with a different wavelength, the maximum kinetic energy of
the emitted electrons is found to be 0.634 eV. What is the
wavelength of this light in nm?

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?

When a monochromatic ultraviolet light with a wavelength of 254
nm falls onto the surface of a particular metal it causes a
photocurrent to flow. A stopping voltage of 2.30 V is required to
totally block the photocurrent.
a. What is the work function of the material?
W = _______ eV
b. What is the cutoff wavelength for this metal?
λ = ________ nm
c. Will light with a wavelength of 523 nm be able to cause a
photocurrent from...

In a photoelectric experiment using a CalciumCalcium surface,
you find a stopping potential of 0.71 V for a wavelength of 347 nm
and a stopping potential of 2.86 V for a wavelength of 217
nm.
Because this is an experiment, your value of Planck's constant will
be slightly different from the official value.
From these data find
a) a value for Planck's constant h
__________________×10−34J⋅s
b) the work function for CalciumCalcium
eVeV
c) the cutoff wavelength for this metal

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