In the Young's double slit experiment, if the phase difference between the two waves interfering at a point is ϕ, the intensity at that point can be expressed by the expression
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a
I=A2+B2cos2ϕ
b
I=ABcosϕ
c
I=A+Bcosϕ2
d
I=A+Bcosϕ
answer is D.
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Detailed Solution
I=a12+a22+2a1a2cosϕPut a12+a22=A and a1a2=B ∴ I=A+Bcosϕ
In the Young's double slit experiment, if the phase difference between the two waves interfering at a point is ϕ, the intensity at that point can be expressed by the expression