A He-Ne gas laser which produces monochromatic light of a known wavelength 6.35x10^-7 m is used to calibrate a reflection grating in a spectroscope. The first order diffraction line is found at an angle of 22° to the incident beam. How many lines per meter are there on the grafting
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A He-Ne gas laser which produces monochromatic light of a known wavelength 6.35x10^-7 m is used to calibrate a reflection grating in a spectroscope. The first order diffraction line is found at an angle of 22° to the incident beam. How many lines per meter are there on the grafting.
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