Chapter 38: Q. 2 (page 1114)
How many photoelectrons are ejected per second in the experiment represented by the graph of FIGURE EX38.2?
Short Answer
There arephoto electrons are ejected per seconds.
Chapter 38: Q. 2 (page 1114)
How many photoelectrons are ejected per second in the experiment represented by the graph of FIGURE EX38.2?
There arephoto electrons are ejected per seconds.
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Get started for freeIn a photoelectric-effect experiment, the stopping potential was measured for several different wavelengths of incident light. The data are as follows:
Use an appropriate graph of the data to determine
(a) the metal used for the cathode and
(b) an experimental value for Planck’s constant .
For what wavelength of light does a 100 mW laser deliver photons per second?
Electrons in a photoelectric-effect experiment emerge from an aluminum surface with a maximum kinetic energy of 1.30 eV. What is the wavelength of the light?
In the atom interferometer experiment shown in Figure laser cooling techniques were used to cool a dilute vapor of sodium atoms to a temperature of . The ultracold atoms passed through a series of collimating apertures to form the atomic beam you see circling the figure from the left. The standing light waves were created from a laser beam with a wavelength of
a. What is the rms speed of a sodium atom in a gas at this temperature ?
b. By treating the laser beam as if it were a diffraction grating. cakculate the first-order diffraction angle of a sodium atom traveling with the rms speed of part a.
c. allow far apart are points and if the second sanding wave is from the first?
d. Because interference is observed between the two paths, each individual atom is apparently present at both point and point . Describe, in your own words, what this experiment tells you about the nature of matter.
Photoelectrons are observed when a metal is illuminated by light with a wavelength less than 388 nm. What is the metal’s work function?
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