Question

When ultraviolet light with a wavelength of 400 nmfalls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is 1.10 eV .

What is the maximum kinetic energy *K*0 of the
photoelectrons when light of wavelength 350 nm falls on the same
surface?

Use *h* = 6.63×10^{?34} J?s for Planck's constant
and *c* = 3.00×10^{8} m/s for the speed of light and
express your answer in electron volts.

Answer #1

For the given situation the expression for maximum kinetic energy of an ejected electron is,

Inserting the given values we can find the work function for this material,

Again using the formula 1, we can find the max kinetic energy for case 2 i.e. for wavelength of 350 nm.

When ultraviolet light with a wavelength of 400 nm falls on a
certain metal surface, the maximum kinetic energy of the emitted
photoelectrons is 1.10 eV .
What is the maximum kinetic energy K0 of the
photoelectrons when light of wavelength 330 nm falls on the same
surface?
Use h =
6.63×10?34J?s for Planck's constant and
c =
3.00×108m/s for the speed of light and
express your answer in electron volts.

When ultraviolet light with a wavelength of 400 nm falls on a
certain metal surface, the maximum kinetic energy of the emitted
photoelectrons is 1.10 eV .
What is the maximum kinetic energy K_0 of the photoelectrons
when light of wavelength 340 nm falls on the same surface?
Use h = 6.63×10−34 J⋅s for Planck's constant and c =
3.00×108 m/s for the speed of light and express your
answer in electron volts.
View Available Hint(s)
K_0 =
eV

When ultraviolet light with a wavelength of 400 nmnm falls on a
certain metal surface, the maximum kinetic energy of the emitted
photoelectrons is 1.10 eVeV .
What is the maximum kinetic energy K0K0K_0 of the
photoelectrons when light of wavelength 270 nmnm falls on the same
surface?
Use hhh = 6.63×10−34 J⋅sJ⋅s for Planck's constant and
ccc = 3.00×108 m/sm/s for the speed of light and express
your answer in electron volts.

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?

Ultraviolet light of wavelength 350 nm is directed at a
potassiums surface. The work function of potassiums is 2.2
eV.
a) Calculate the maximum energy of photoelectrons in units of
eV.
b) Explain why x-ray is not used in the photoelectric
effect.

1. Light of wavelength 401 nm incident on a certain metal
produces photoelectrons with a maximum kinetic energy of 1.78 eV.
What is the maximum wavelength of light capable of producing
photoelectrons for this metal?
2. Electrons in an electron microscope have been accelerated
through a potential difference of 1250 V. How large is their de
Brogile wavelength?

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...

1. An ultraviolet light with wavelength 380 nm and intensity
1.00 W/m2 falling on 1.00 cm2 area of Lithium surface. If 0.9 % of
the incident photons produces photoelectrons, how many photons
emitted per second.
2.Calculate maximum kinetic energy of ejected photoelectron when
320 nm light falls on Silver surface.

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...

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?

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