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Chapter 39: Q. 21 (page 1137)
What minimum bandwidth is needed to transmit a pulse that consists of 100 cycles of a oscillation?
The minimum bandwidth is needed to transmit a pulse that consists of 100 cycles of a oscillation is .
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FIGURE Q39.1 shows the probability density for photons to be detected on the-axis.
a. Is a photon more likely to be detected at or at ? Explain.
b. One million photons are detected. What is the expected number of photons in a -wide interval at ?
The probability density of finding a particle somewhere along thethe probability density is . For, the probability density decreases by a factor of each time the distance from the origin is doubled. What is the probability that the particle will be found in the interval
A thin solid barrier in the plane has a diameter circular hole. An electron traveling in the direction with passes through the hole. Afterward, is it certain that is still zero? If not, within what range is likely to be?
Andrea, whose mass is , thinks she's sitting at rest in her 5.0-m-long dorm room as she does her physics homework. Can Andrea be sure she's at rest? If not, within what range is her velocity likely to be?
A small speck of dust with mass has fallen into the hole shown in FIGURE P39.46 and appears to be at rest. According to the uncertainty principle, could this particle have enough energy to get out of the hole? If not, what is the deepest hole of this width from which it would have a good chance to escape?
FIGURE P39.46
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