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
View Solution FreeMore Wave motion Questions
Sound source of frequnecy 170 Hz is placed near a wall. A man walking from the source towards the wall finds, that there...Which of the following combinations can give standing wave....A source of frequency 200 Hz is moving towards an observer with a velocity equal to the sound velocity V. If observer al...Following are equations of four waves (i) y1 = a sin ω (ii) y2 = a cos ω (iii) z1 = a sin ω (iv) z2 = a c...Given the value of Rydberg constant is 107 m-1, the wave number of the last line of the Balmer series in hydrogen spectr...