In YDSE , intensity at central maxima is I 0 . The ratio I I 0 , at path difference λ 8 on the screen from central maxima, is closed to

Question

In YDSE , intensity at central maxima is I 0 . The ratio I I 0 , at path difference λ 8 on the screen from central maxima, is closed to, 0.74, 0.8, 0.9, 0.85

MARKS App · Accepted Answer

∆ ϕ = 2 π λ × λ 8 = π 4 I = I 0 cos 2 ⁡ π 8 = I 0 1 + cos ⁡ π / 4 2 = I 0 1 + 1 2 2 = 0.85 I 0

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