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Two sources of sound of the same frequen...

Two sources of sound of the same frequency produce sound intensities `I` and `4I` at a point `P` when used individually. If they are used together such that the sounds from them reach `P` with a phase differenceof `2pi//3`, the intensity at `P` will be

Text Solution

Verified by Experts

The correct Answer is:
3I
We use `I_(R) = I_(1) + I_(2) + 2sqrt(I_(1)I_(2))cosphi`
= `I + 4I + 4I cos ((2pi)/(3))`
= 3I
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