CBSE Class 12-science Answered
Question 1.b
Asked by ritikabehera01 | 03 Mar, 2019, 12:41: PM
Expert Answer
In double slit experiment, we know minimum occurs from centre of screen at a distance y = [ n +(1/2) ] λD/d , n =0, ±1, ±2 ..... etc
where λ is wavelength, D is slits-to-screen distance, d is distance between slits.
for first minimum n = 1, hence we have , y = (1/2)λD/d = D or d = λ/2
but we are given that d = 2D, hence D = λ/4
Answered by Thiyagarajan K | 03 Mar, 2019, 07:57: PM
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