Problem 7.20 Derive the fine structure formula (Equation 7.68) from the relativistic correction (Equation 7.58) and the spin-orbit coupling (Equation 7.67). Hint: Note that (except for , where only the plus sign occurs); treat the plus sign and the minus sign separately, and you’ll find that you get the same final answer either way.

the force on the thing and the distance the force moves the thing

the components of a vector are the parts of the vectors that are to each other.

b perpendicular

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015