Question

a)

In a particular photoelectric effect experiment, photons with an energy of 5.10 eV are incident on a metal surface, producing photoelectrons with a maximum kinetic energy of 3.20 eV.

Calculate the work function of the metal.

_______ eV

b) In a particular photoelectric effect experiment, photons with
an energy of 5.10 eV are incident on a metal surface, producing
photoelectrons with a maximum kinetic energy of 3.20 eV. The photon
energy is then adjusted to 6.40 eV. Calculate the maximum kinetic
energy of the photoelectrons now.

_______ eV

c) Calculate the wavelength, in nanometers, of a 6.40 eV
photon.

_______ nm

Answer #1

The work function for copper is 4.5 eV.
(a) Find the threshold frequency and wavelength for the
photoelectric effect to occur when monochromatic electromagnetic
radiation is incident on the surface of a sample of copper.
Hz
nm
(b) Find the maximum kinetic energy of the electrons if the
wavelength of the incident light is 190 nm.
eV
(c) Find the maximum kinetic energy of the electrons if the
wavelength of the incident light is 240 nm.
eV

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...

The work function for gold is 5.01 eV.
(a) Find the threshold frequency and wavelength for the
photoelectric effect to occur when monochromatic electromagnetic
radiation is incident on the surface of a sample of gold. In Hz and
nm
(b) Find the maximum kinetic energy of the electrons if the
wavelength of the incident light is 160 nm.in eV (
c) Find the maximum kinetic energy of the electrons if the
wavelength of the incident light is 220 nm. In...

The work function for aluminum is 4.2 eV. (a) What is the cutoff
frequency of light
incident on an aluminum target that releases photoelectrons from
its surface? (b) Find the
corresponding cutoff wavelength. (c) If photons of energy 5.0 eV
are incident on an
aluminum target what is the maximum kinetic energy of the ejected
photoelectrons? (d)
what is the maximum velocity of a photoelectron traveling from the
anode to the cathode
of a photocell? (d) If a blue beam...

1. Calculate photoelectric current when a UV radiation (190 nm)
with 1.56 x 104 µW striking on a metal surface.
2. What is the power of incident photon of wavelength 400 nm
light falling on a metal surface producing 0.48 µA current,
assuming 100 % of the incident photon produces photoelectrons?

The work function for aluminum is 4.2 eV. (a) What is the cutoff
frequency of light
incident on an aluminum target that releases photoelectrons from
its surface? (b) Find the
corresponding cutoff wavelength. (c) If photons of energy 5.5 eV
are incident on an
aluminum target what is the maximum kinetic energy of the ejected
photoelectrons? (d)
what is the maximum velocity of a photoelectron traveling from the
anode to the cathode
of a photocell? (d) If a red laser...

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?

An experimental is conducted to investigate the
photoelectric effect with a Barium plate. When the wavelength of
the incident light is less than 500.0 nm the plate starts emitting
electrons.
a) what is the threshold frequency of the Barium plate?
b) what is the work function of Barium?
The wavelength of the incident light is charged to 300.0 nm.
c) what is the kinetic energy of the photoelectrons?

Lithium, beryllium, and mercury have work functions of 2.30 eV,
3.90 eV, and 4.50 eV, respectively. Light with a wavelength of 465
nm is incident on each of these metals.
(a) Determine which of these metals exhibit the photoelectric
effect for this incident light. (Select all that apply.)
lithium
beryllium
mercury
Explain your reasoning.
(b) Find the maximum kinetic energy for the photoelectrons in
each case.
Kmax, Li = ___________eV
Kmax, Be =___________ eV
Kmax, Hg = ____________eV

The “electric eyes” used to open doors automatically are based
on the photoelectric effect. The metal surface inside the “eye” [an
evacuated glass chamber containing the surface (cathode) and a
photocurrent collector (anode)] continuously provides current until
the light beam that actuates it is interrupted.
a. What is the maximum kinetic energy of photoelectrons produced
by a mercury vapor lamp which emits 436 nm violet light causing the
actuation of an electric eye of work function 2.1 eV?
b. What...

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