123Fall2016_Final1_LectureOnly

A diffraction grating has a slit spacing of 21 m it

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12. [7 Points] A diffraction grating has a slit spacing of ࠵? = 2.1 ࠵? m. It is illuminated with yellow light ( ࠵? = 589 nm). Which answer best describes all the principle maxima: 13. [7 Points] An observer sees a system moving past her at a relativistic speed that consists of a mass attached to the end of a spring. The system is oscillating, and she measures a period ࠵? 1 . A second observer, who is moving with the spring-mass system, measures a period ࠵? 2 . Which of the following is true? A. ࠵? 1 > ࠵? 2 B. ࠵? 1 < ࠵? 2 C. ࠵? 1 = ࠵? 2 D. Not enough information to tell.
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Name ______________________________________ Student ID __________________ Score____ _______ last first Physics 123 A, Fall 2016 Final, page 9
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