Problem: A commercial diffraction grating has 500 lines per mm. When a student shines a 530 nm laser through this grating, how many bright spots are visible on a screen behind the grating?

FREE Expert Solution

The number of bright spots:

n=2m+1

The diffraction grating condition is given as:

dsinθ=mλ

θ = 90° for a maximum order of bright fringes. 

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A commercial diffraction grating has 500 lines per mm. When a student shines a 530 nm laser through this grating, how many bright spots are visible on a screen behind the grating?

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