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A diffraction grating with 2.507 X 10^3 lines/cm is used to examine the sodium spectrum. a) calculate the angular separation of the two closely spaced yellow lines of sodium (588.485 nm and 589.067 nm) in the first order. Answer in units of degrees. b) calculate the angular separation for the two lines in second order. Answer in units of degrees. c) calculate the angular separation for the two lines in the third order. andswer in the units of degrees.

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