Wave motionHard
Question
The path difference between two interfering waves at a point on the screen is λ/8 The ratio of intensity at this point and that at the central fringe will be :-
Options
A.0.853
B.8.53
C.85.3
D.853
Solution
Phase difference = 
(Path difference)
ᐃφ =
I′ = I + I + 2I cos
= (2 + √2)I
I″ = ( a + a)2 = 4I
= 0·853
(Path difference)ᐃφ =
I′ = I + I + 2I cos
= (2 + √2)II″ = ( a + a)2 = 4I
= 0·853Create a free account to view solution
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