Modern Physics:
Errata

by Gary N. Felder and Kenny M. Felder

Below are the errors we are aware of in the text. Of course if you've found any others we want to hear about them. Please email us at the link at the bottom of the page.

• Page 6: Problem 1 should specify that Mary is moving with constant velocity.
• Pages 29-30: In the example that spans these two pages, the man and woman switched places. The picture at the top of page 30 should show the man running left on top and the woman standing still below that. (Credit to Jerome Fung)
• Page 35: In Part a of Problem 20, "the moment the clock passes Earth" should be "the moment the rocket passes Earth." (Credit to Jerome Fung)
• Pages 70-71: The velocities in Figure 2.9 (p. 70) should be unprimed and those in Figure 2.10 (p. 71) should be primed. (Credit to Jerome Fung)
• Page 79: In Question 1, Part b, the question should end with "(divided by c^2)". (Credit to Omar Farooq Anjum)
• Page 83: The velocities in Figure 2.14 should be unprimed and those in Figure 2.15 should be primed. (Credit to Jerome Fung)
• Page 107: In the last paragraph, "This well just form" should say "This may be." (Credit to Leila Cowan)
• Page 114: At the top of the page, we write numbers without their units. The simplest fix would be a note saying that we are assuming in this paragraph that all numbers are in SI units. (Credit to Omar Farooq Anjum)
• Page 141: In the last paragraph of the last bullet point on the page, "the average over many electrons" should say "the average over many waves." (Credit to Noah Leaf)
• Page 233: In Problem 13, Part a, "Equation (7.13)" should be "Equation (5.9)."
• Page 256: In Problem 11, the parts are labeled a, b, c, a, b, c instead of a, b, c, d, e, f.
• Page 274: In the third paragraph under the heading "Wave Packets and Normalization," the word "uncertainly" should be "uncertainty." (Credit to Caroline Faust)
• Page 281: In the figure in the example, the vertical axis on the right should be labeled |psi-hat(k)|^2. It is missing the "hat" (aka "caret") above the psi. (Credit to Noah Leaf)
• Page 284: Question 1 should say |psi-hat|^2 instead of psi-hat (for both psi-hat(-5) and psi-hat(-2)). (Credit to Jerome Fung)
• Page 310: In the last paragraph before the heading "A Tale of Two Equations," the first sentence says "... remember that the time-independent Schrodinger equation ...," but it should be "... remember that the time-dependent Schrodinger equation ... ."
• Page 377: In applying our simplified screening model, the Example assumes electrons in the outer subshell half-screen, but in the text and problems, we assume electrons in the outer shell half-screen. Neither of these versions of the model is particularly accurate--the model is presented as a tool to teach basic concepts--but the model should be applied consistently. (Credit to Swagato Banerjee)
• Page 432: In Problem 19, Part b, "conis" should be "coins." (Credit to John Hargy)
• Page 448: In the example, the answers are calculated with the energy levels 0, 0.1 eV, and 0.5 eV. (If you use the given values of 0, 2 eV, and 5 eV, the final probability comes out to 8 times 10^-9. (Credit to José Natário)
• Page 480: In Figure 10.24, the units for u should be "J/(m^3 Hz)." (Credit to John Hargy)
• Page 485: In Problem 15, the specific heat capacity of water should be 4.2 times 10^6, not 4.2 times 106. (Credit to John Hargy)
• Page 501: The second paragraph should refer to the "eight corners" of a cube, rather than six. (Credit to Blake Laing)
• Page 508: On the last line of the page, "availabel" should be "available." (Credit to Blake Laing)
• Page 584: Problem 19 has two parts labeled "e." The second one should of course be "f." (Credit to John Hargy)
• Page 622: Problem 11 jumps from Part a to Part c, skipping b for no good reason. (Credit to John Hargy)
• Page 625: At the top of the page, "the allowed transition is much slower" should be "the allowed transition is much faster." (Credit to José Natário)
• Page 600: In the box in Figure 13.1, it says hadrons feel "stong force." That should be "strong force." (Credit to Vera Backman)
• Page 729: The masses of the Z and W bosons in the table are wrong. The Z boson mass is 91,000 MeV/c^2, and the W boson mass is 80,000 MeV/c^2. (Credit to José Natário)
• Online - Answers to Odd-Numbered Problems: In Section 1.4.2, the answer to Problem 9 should say -7.56 min. (It is missing the minus sign.)

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	If you have found other errors or have questions, we would love to hear from you. Click here to email the authors at GFelder@Smith.edu.