Which of the following devices make use of the photoelectric effect?
a. digital cameras
b. photocopiers
c. laser printers
d. solar cells
e. all of the above
[Ques. 2] The person who first explained the photoelectric effect was
a. Max Planck
b. Albert Einstein
c. Neils Bohr
d. Erwin Schroedinger
e. Werner Heisenberg
[Ques. 3] What quantities are plotted on a blackbody radiation curve?
a. total radiated energy vs. temperature
b. radiation intensity vs. wavelength
c. wavelength of peak emission vs. temperature
d. none of the above
[Ques. 4] The person who first explained the blackbody spectrum was
a. Max Planck
b. Albert Einstein
c. Neils Bohr
d. Erwin Schroedinger
e. Werner Heisenberg
[Ques. 5] The quantity that is quantized in the oscillating atoms of a blackbody is
a. angular momentum
b. energy
c. the emission spectrum
d. the absorption spectrum
e. the wave function
[Ques. 6] What is coherent light?
a. light of a single wavelength
b. light that is all in phase
c. light that is polarized in one direction
d. none of the above
[Ques. 7] Which of these is not involved in the operation of lasers?
a. stimulated emission c. metastable state
b. population inversion d. blackbody radiation
[Ques. 8] A three dimensional image made using a laser is a(n)
a. emission spectrum
b. absorption spectrum
c. wave function
d. hologram
e. photoelectric effect
[Ques. 9] Electron diffraction shows
a. that electrons behave like waves
b. the photoelectric effect
c. characteristic x ray spectra
d. that electrons in atoms have only certain allowed energies
[Ques. 10] If the speed of an electron increases, its de Broglie wavelength
a. increases c. stays the same
b. decreases d. may increase or decrease
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