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Chapter 6: Q6DQ (page 1519)
Why can’t an electron decay to two photons? To two neutrinos?
The electron cannot decay to two photons or two neutrinos as this would violate the conservation of charge.
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Does it make sense to ask, “If the universe is expanding, what is it expanding into?”
Individual atoms have discrete energy levels, but certain solids (which are made up of only individual atoms) show energy bands and gaps. What causes the solids to behave so differently from the atoms of which they are composed?
It is stated in Section 40.3 that a finite potential well always has at least one bound level, no matter how shallow the well. Does this mean that as ? Does this violate the Heisenberg uncertainty principle? 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.
The black dots at the top of Fig. represent a series of high-speed photographs of an insect flying in a straight line from left to right (in the positive x-direction). Which of the graphs in Fig. most plausibly depicts this insect’s motion?
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