M 1 and M 2 are two plane mirrors which are kept parallel to each other as shown. There is a point 'O' on perpendicular screen just infront of 'S'. What should be the wavelength of light coming from monchromatic source 'S'. So that a maxima is formed at 'O' due to interference of reflected light from both the mirrors. [Consider only 1st reflection]. [ D > > d, d > > λ ]
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
The 2 sources are.
As O is a maxima, Hence OP = β .
⇒ 
; get 
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