Question: Laser light passes through a diffraction grating that has 5 0 0 slits per millimeter. The rays forming two red spots on the wall that

Laser light passes through a diffraction grating that has 500 slits per millimeter. The rays forming two red spots on the wall that are nearest to the central spot make an 18.7 angle with the ray forming the central spot. What is the wavelength of the light? Show your calculation.
Laser light passes through a diffraction grating

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