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Chapter 6: Q5E (page 1314)
An electron is moving with a speed of 8.00 x 106 m/s. What is the speed of a proton that has the same de Broglie wavelength as this electron?
The wavelength of alpha-particle is 7.01 femtometer.
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Some lasers emit light in pulses that are only 10-12 s in duration. The length of such a pulse is . Can pulsed laser light be as monochromatic as light from a laser that emits a steady, continuous beam? Explain.
Ionic crystals are often transparent, whereas metallic crystals are always opaque. Why?
As stars age, they use up their supply of hydrogen and eventually begin producing energy by a reaction that involves the fusion of three helium nuclei to form a carbon nucleus. Would you expect the interiors of these old stars to be hotter or cooler than the interiors of younger stars? Explain.
Human skin is relatively insensitive to visible light, but ultraviolet radiation can cause severe burns. Does this have anything to do with photon energies? Explain.
When a monochromatic light source moves toward an observer, its wavelength appears to be shorter than the value measured when the source is at rest. Does this contradict the hypothesis that the speed of light is the same for all observers? Explain.
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