PHYSICS 141A Final: physics141A-sp1994-final-Instructor-exam
Document Summary
Friday, may 13, 1994 12:30-3:30 pm closed book. Information: please cross out any work in your blue book which you do not wish to be graded. A freehand skerch is entirely acceptable, but it must be clearly legible and clearly labeled! s t 1. 6 x 10-19 c = 4. 8 x 10-10 e. s. u. me*9*rg-28gm. I x 10-27 erg sec = l0-3 j sec ks * 1. 4 x 10-16 erg k-l = 1. 4 x 10-23 j k-l. Ps = e62mc t 9. 3 x 10-21 erg gauss-l x 9. 3 x ltu j tesla-l. I ev + 1. 6 x 1gl2 erg * 1. 6 x 10-te j loagauss=ltesla. I statvolt = 300 volts: short problems (25 points) (i) two phonons with wave vectors kland -) k 2 scatter. With the aid of carefully drawn skerches explain what is meant by a normal process and an umklapp process.
