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  • Two waves of same frequency and same amplitude from two monochromatic sources are allowed to superpose at a certain point. If in one case, the phase difference is 0 and in other case it is <img alt

Two waves of same frequency and same amplitude from two monochromatic sources are allowed to superpose at a certain point. If in one case, the phase difference is 0 and in other case it is \pi / 2, then the ratio of the intensities in the two cases will be:

Option: 1

1 : 1


Option: 2

2 : 1


Option: 3

4 : 1


Option: 4

None of the above


Answers (1)

best_answer

Where phase difference is 0 , intensity is maximum.

Where, \mathrm{\phi=\frac{\pi}{2}} or \mathrm{\frac{\phi}{2}=\frac{\pi}{4},}

the intensity will be \mathrm{I=I_{\max } \cos ^2 \frac{\phi}{2}=\frac{I_{\max }}{2}}

\mathrm{\therefore \quad}  The desired ratio is \mathrm{2: 1}

Posted by

seema garhwal

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