What is the separation between two slits for which 650 nm light has its first maximum...

Question

Question

What is the separation between two slits for which 650 nm light has its first maximum at an angle of 30.5°?

Answer 1

Answer #1

conditon of maximum in double slit arangement

$d sin\theta =m\lambda$ (d = slit width, m= no. of maximum)

d=1x650/sin30.5 =1280 nm.

Answer 2

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