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PHYSHW5

# PHYSHW5 - A laser emitting light cf wavelength 555 nm is...

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Unformatted text preview: A laser emitting light cf wavelength 555 nm is incident en a diffracticn grating. What is the maximum number cf lines per centimeter fer which the nu = 2 principal maximum will be visible? [Ne units are necessary in 3mm answer.} Scluticn: 1f the m = 2 principal maximum is just visible, then it appears en the screen at an angle cf ﬂﬂ“. F'rcni this, are can calculate the slit spacing fer the grating: risintl = m}; =:- a’squHJ" = 2(555 11m] =:r d = 1111] nm- Time, 1 ]. line It}? uni -_ : _ = I. . _ - :5! 1111:] 11m ] {m1 EllIlEI' lllﬁafcm This number cf lines per centimeter is a res-circus: because, as the grating density increases. so class the angular pcsiticn cf each spectral line. ...
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