When laser light of wavelength 632.8 nm passes through a diffraction grating, the first bright spots occur at +/1 17.8 degrees from the central maximum. (a) What is the line density (in lines/cm) of this grating? (b) How many additional pares of bright spots are there beyond the first bright spots?

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When laser light of wavelength 632.8 nm passes through a diffraction grating, the first
bright spots occur at +/1 17.8 degrees from the central maximum.
(a) What is the line density (in lines/cm) of this grating?
(b) How many additional pares of bright spots are there beyond the first bright spots?
Transcribed Image Text:When laser light of wavelength 632.8 nm passes through a diffraction grating, the first bright spots occur at +/1 17.8 degrees from the central maximum. (a) What is the line density (in lines/cm) of this grating? (b) How many additional pares of bright spots are there beyond the first bright spots?
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