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Unformatted text preview: Exam General Physics 219 Fall 2010 Final 1 Problem 1 Î¸ d In class we shone green light from a laser with wavelength Î» = 532 nm on a grating with 600 lines per mm. a) Compute the angles Î¸ m =1 and Î¸ m =2 at which the first two maxima (con structive interference) should be found. 2 Problem 2 air (n=1) soap film (n=1.46) air (n=1) Light of wavelength 500nm shines on a soap bubble film (n=1.46). If seen from above the interference is constructive. a) Give the two smallest possible values for the thickness of the soap film. 3 Problem 3 A photon of energy E ph. = 12 . 75 eV is absorbed by a hydrogen atom. If the atom was originally in the ground state: a) to which level does the electron jump? 4 Problem 4 The mass of the 14 6 C nucleus is M 14 = 14 . 003241 u where u is a unit of mass such that 1 u Ã— c 2 = 931 . 494 MeV . Furthermore, the masses of the proton and neutron are m p = 1 . 0072765 u, m n = 1 . 0086649 u (0.1) a) Compute the mass defect (in u ) of the 14 6 C nucleus....
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