A 3500-line/cm grating produces a third-order fringe at a 28.0o angle. What wavelength of light is being

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A 3500-line/cm grating produces a third-order fringe at a 28.0o angle. What wavelength of light is being used?
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Fundamentals of Physics

ISBN: 978-0471758013

8th Extended edition

Authors: Jearl Walker, Halliday Resnick

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