Here is the more complete description of the Michelson-Morley experiment mentioned on p. 14 of the textbook.
Here is a description of the binomial expansion.
Here is the "More" section on Millikan's oil drop experiment, mentioned on p. 132 of the textbook.
Here is the "More" section on Derivation of Compton's Equation, mentioned on p. 153 of the textbook.