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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Figure 40.15a shows that the higher the energy of a bound state for a finite potential well, the more the wave function extends outside the well (into the intervals and ). Explain why this happens.
In classical (Newtonian) mechanics, the total energy E of a particle can never be less than the potential energy U because the kinetic energy K cannot be negative. Yet in barrier tunneling a particle passes through regions where E is less than U. Is this a contradiction? Explain.
Explain why Fig. 38.4 shows that most photoelectrons have kinetic energies less than , and also explain how these smaller kinetic energies occur.
A photon of frequency fundergoes Compton scattering from an electron at rest and scatters through an angle . The frequency of the scattered photon is f'. How is f' related to f? Does your answer depend on ? Explain.
In attempting to reconcile the wave and particle models of light, some people have suggested that the photon rides up and down on the crests and troughs of the electromagnetic wave. What things are wrongwith this description?
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