Suppose that an electron (m = 9.1 x 10^-31 kg) is moving with a velocity of 1500 m/s.
a. What is the momentum of this electron?
b. What is the de Broglie wavelength of this electron?
c. How does this wavelength compare to those of visible light? (See fig. 16.5.)

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1021 Hz 109 Hz 106 Hz 1018 Hz 1015 Hz 1012 Hz 103 Hz - Light Radio Ultra- Gamma rays Microwaves | TV || FM X rays Long wave Infra- red AM violet - Visible 10-15 m 10-9 m 10-8 m 10-3 m 10-12 m 103 m 108 m 2 (wavelength)