Errors and Clarifications for Serway / Faughn

College Physics 6 th Edition

Alas, not all were corrected in 7th edition

Fig 15.22very confusing to have the size of the mg vector change when physically it doesnít change.Also a bit odd to have the mg and Dí vectors separated; both act on the body, not on some strings

Ch 18 p 568 below eq 18.8†††††† 1/e = .368, not .632

Fig 18.20 the contact points should be in contact with the bimetallic strip in this configuration

Table 23.1, Image location sign convention is wrong

Ch 24.1: conditions for interference claims wavelengths must be identical.† Rather, they must be integer multiples of each other, or nearly so.

Eq 25.2 and discussion of angular magnification; also in summary: The text's definition is too limited:† should not be restricted to object at the near point.Further, should refer to small objects (so the physical object height cancels in 25.2).† Angular magnification is not the relevant variable for an object already huge, as it grows from an angular size of 150 degrees to 179 degrees after some optics.† Rather, it's about magnification of details, even for a big object.

Fig 25.6 Confusing that the same object is given a different height in 25.6 a) and b)

Ch 26.9 p 826 1u is given incorrectly as 939.494= MeV/c2. The correct value is then used in the calculation 2 lines later.

Ch 27.4 p 8471Angstrom is used as a unit where rest of discussion in nm.Defined back in 21.12 as 1 Angstrom = .1nm

Ch27.7 p852wavelength for eís in an electron microsope is way too long: The text suggests .01 * visible wavelength, which is 4-5 nm. But lambda hc/sqrt[2 m c2 * KE] for KE = 54 eV it's already .17 nm, x 20 smaller. A typical electron microscope energy is > 50 keV, so shorter still by another factor 30. The text confuses resolution with wavelength, but e microscope isnít limited by Rayleigh criterion. Instead, itís lens quality that limits electron microscope resolution. Reference: http://= www.biologie.uni-hamburg.de/b-online/e03/03e.htm for example

Ch 28 Eq 28.2appears to give not Rhydrogen (measured), but Rinfinity (calculated , in eq 28.16 for an infinitely heavy nucleus, ignoring corrections due to Me/Mproton)