Question

A 480 lines/mm diffraction grating is illuminated by light of wavelength 510 nm .

How many bright fringes are seen on a 4.0-m-wide screen located 2.1 m behind the grating?

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Answer #1

Ix 16 a - 2.083 x/0M 480 480 D 4M MI07 16 m D 2.1M 2 tan 4-2m 2-1 2 2.1m- for nt sin (8.) nx ST0 x163 Sin (42.6)= 2.093 x16 2

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