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Chapter 38: Q 11 (page 1113)
If an electron is in a stationary state of an atom, is the electron at rest? If not, what does the term mean?
No, the electron is not at rest.
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The first three energy levels of the fictitious element X were shown in FIGURE P38.56. An electron with a speed of 1.4 X 106 m/s collides with an atom of element X. Shortly afterward, the atom emits a photon with a wavelength of 1240 nm. What was the electron's speed after the collision? Assume that, because the atom is much more massive than the electron, the recoil of the atom is negligible. Hint: The energy of the photon is not the energy transferred to the atom in the collision.
Which metals in Table 38.1 exhibit the photoelectric effect for (a) light with and (b) light with ?
An experiment was performed in which neutrons were shot through two slits spaced 0.10 mm apart and detected 3.5 m behind the slits. Figure P38.49 shows the detector output. Notice the scale on the figure. To one significant figure, what was the speed of the neutrons?
An FM radio station broadcasts with a power of 10 kW at a frequency of 101 MHz.
a. How many photons does the antenna emit each second?
b. Should the broadcast be treated as an electromagnetic wave or discrete photons? Explain.
Find the radius of the electron’s orbit, the electron’s speed, and the energy of the atom for the first three stationary states of
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