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In Young's double slit experiment, phase...

In Young's double slit experiment, phase difference between the waves at a point on screen having intensity less than the average intensity on screen may be

A

`pi//4`

B

`2pi//3`

C

`pi`

D

`7pi//8`

Text Solution

Verified by Experts

The correct Answer is:
B, C, D
Let maximum intensity be `I_(0)`
`I=I_(0)cos^(2)((Deltaphi)/(2)), I_(av)=(I_(0))/(2), I lt I_(av) implies cos^(2)((Deltaphi)/(2)) lt (1)/(2)`
`implies cos((Deltaphi)/(2)) lt (1)/(sqrt2) implies (pi)/(2) lt Deltaphi lt (3pi)/(2)`.
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