Problem: A 500 lines per mm diffraction grating is illuminated by light of wavelength 510 nm.How many diffraction orders are seen?mmax= __________

FREE Expert Solution

Bright fringes are formed at:

dsinθ=mλ d is the slit width and m is the order.

d = 1/N

N = 500 lines/mm(1000mm/1m) = 5 × 105 lines/m

The maximum number of orders occurs when θ = 90, sin90 = 1.

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Problem Details

A 500 lines per mm diffraction grating is illuminated by light of wavelength 510 nm.
How many diffraction orders are seen?
mmax= __________

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