In a double – slit experiment, at a certain point on the screen the path difference between the two interfering waves is 1 8 t h of a wavelength. The ratio of the intensity of light at that point to that at the center of a bright fringe is:

Question

In a double – slit experiment, at a certain point on the screen the path difference between the two interfering waves is 1 8 t h of a wavelength. The ratio of the intensity of light at that point to that at the center of a bright fringe is:, 0.853, 0.672, 0.568, 0.760

MARKS App · Accepted Answer

I = I 0 c o s 2 ∆ ϕ 2 I I 0 = c o s 2 2 π λ × ∆ X 2 = c o s 2 π 8 ; I I 0 = 0.853

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