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Chapter 38: Q. 58 (page 1116)
Starting from Equation 38.32, derive Equation 38.33
The Derive equation is
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The allowed energies of a simple atom are , , and 6.00 . An electron traveling with a speed of collides with the atom. Can the electron excite the atom to the stationary state? The stationary state? Explain.
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?
The electron interference pattern of Figure 38.12 was made by shooting electrons with of kinetic energy through two slits spaced role="math" localid="1650737433408" apart. The fringes were recorded on a detector behind the slits.
a. What was the speed of the electrons? (The speed is large enough to justify using relativity, but for simplicity do this as a nonrelativistic calculation.)
b. Figure 38.12 is greatly magnified. What was the actual spacing on the detector between adjacent bright fringes?
A proton emits a gamma-ray photon with energy 2.0 MeV in a quantum jump from n =2 to n= 1.
A red laser with a wavelength of 650 nm and a blue laser with a wavelength of 450 nm emit laser beams with the same light power. How do their rates of photon emission compare? Answer this by computing Rred/Rblue.
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