Question
In a photoelectric experiment it is found that a stopping potential of 1.00 V is needed...
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?
Homework Answers
Answer #1
Not the answer you're looking for?
Similar Questions
In a photoelectric experiment using a CalciumCalcium surface, you find a stopping potential of 0.71 V...
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
In an advanced laboratory class a student performs the photoelectric experiment. Ultraviolet light is shone on...
In an advanced laboratory class a student performs the
photoelectric experiment. Ultraviolet light is shone on a
particular metal and the stopping potential is measured at the same
time. It is found that 2.75 V is needed to stop all the electrons
when the wavelength of the light is 260 nm, and 4.22 V for a
wavelength of 211 nm. What is the work function of the metal?
b) What is Planck's constant based on this measurement?
Light of wavelength 342 nm shines on a metal surface and the stopping potential V0 in...
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)
Light of wavelength 235 nm is incident on Magnesium in a photoelectric effect experiment. The work...
Light of wavelength 235 nm is incident on Magnesium in a
photoelectric effect experiment. The work function of Magnesium is
3.68 eV.
(a) What is the maximum kinetic energy of the emitted electrons,
in eV?
(b)What is the maximum velocity of the emitted electrons, in
m/s?
(c) What is the stopping potential, in Volts, that results in no
collected photoelectrons?
(d) Light of wavelength 235 nm is now incident on lead (work
function 5.40 eV). What is the maximum kinetic...
In a photoelectric-effect experiment, the stopping potentials was measured as 1.0 V for light of wavelength...
In a photoelectric-effect experiment, the stopping potentials
was measured as 1.0 V for
light of wavelength 600 nm, 2.0 V for 400 nm, and 3.0 V for
300 nm. Determine the
work function for this material and the implied value of
Planck’s constant h
(graphically)
Two light sources are used in a photoelectric experiment to determine the work function for a...
Two light sources are used in a photoelectric experiment to
determine the work function for a particular metal surface. When
green light from a mercury lamp (λ = 546.1 nm) is used, a
stopping potential of 0.954 V reduces the photocurrent to zero.
(a) Based on this measurement, what is the work function for
this metal?
eV
(b) What stopping potential would be observed when using light from
a red lamp (λ = 628.0 nm)?
V
A) Within a photoelectric effect experiment, light shines on the surface of a metal plate and...
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...
In a particular photoelectric experiment, a stopping potential of 2.1V is measured with UV light λ...
In a particular photoelectric experiment, a stopping potential
of 2.1V is measured with UV light λ =290nm incident on the unknown
metal. A) using the same metal, what is the expected stopping
potential expected when using 440nm light? B) what is the longest
wavelength light that could possibly eject an electron from this
metal?
a) A photon of wavelength 43 nm is incident upon a metal in a photoelectric apparatus....
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...
Problem: Light strikes a sodium surface, causing photoelectric emission. The stopping potential for 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.
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 6 minutes ago
asked 44 minutes ago
asked 59 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago