Questions
The ratio of the intensity at the centre of a bright fringe to the intensity at a point one-quarter of the distance between two fringe from the centre is
detailed solution
Correct option is A
I=4I0cos2φ2At central position I1=4I0 ……(i)Since the phase difference between two successive fringes is two times the phase difference between two points separated by a distance equal to one quarter of the distance between the two, successive fringes is equal to δ=(2π) 14=π2 radian ⇒I2=4I0cos2π22=2I0 ……(ii)Using (i) and (ii), I1I2=4 I02 I0=2Talk to our academic expert!
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