Solved: A He-Ne gas laser which produces monochromatic
Chapter , Problem 73(choose chapter or problem)
A He-Ne gas laser which produces monochromatic lightof wavelength A = 6.328 X 10_7m is used to calibrate areflection grating in a spectroscope. The first-order diffractionline is found at an angle of 21.5 to the incident beam. Howmany lines per meter are there on the grating?
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