Question

21.
A slit of width 'a' is illuminated by white light.
For what value of 'a' will the first minimum
for red light of wavelength 650 nm be at
0 = 15° ? (Given sin 15° = 0.2588)
(A) 10 um (B) 2.5 um
(C) 5 um
4.5 um​

Answer 1

Answer:

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Step-by-step explanation:

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