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Chapter 6: Q1DQ (page 1519)
Does the speedometer of a car measure speed or velocity? Explain.
A speedometer will only measure the speed of the car not the velocity of the car.
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What is the essential characteristic for an element to serve as a donor impurity in a semiconductor such as Si or Ge? For it to serve as an acceptor impurity? Explain
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.
In Fig. 40.28, how does the probability of finding a particle in the center half of the region compare to the probability of finding the particle in the outer half of the region? Is this consistent with the physical interpretation of the situation?
In a photoelectric-effect experiment, which of the following will increase the maximum kinetic energy of the photoelectrons? (a) Use light of greater intensity; (b) use light of higher frequency; (c) use light of longer wavelength; (d) use a metal surface with a larger work function. In each case justify your answer.
Why is the alpha, beta, or gamma decay of an unstable nucleus unaffected by the chemical situation of the atom, such as the nature of the molecule or solid in which it is bound? The chemical situation of the atom can, however, have an effect on the half-life in electron capture. Why is this?
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