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Three waves due to three coherent sources meet at one point. Their amplitudes are $\sqrt{2} A_{0}, 3 A_{0}$ and $\sqrt{2} A_{0}$ Intensity corresponding to $A_{0}$ is $I_{0}$ . Phase difference between first and second is $45 °$ . Path difference between first and third $\frac{λ}{4}$ . In phase angle, first wave lags behind from the other two waves. Find resultant intensity at this point.

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$I' = 15 I_{o}$

$I' = 35 I_{o}$

$I' = 25 I_{o}$

$I' = 45 I_{o}$

answer is B.

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Detailed Solution

$difference of \frac{π}{2}$

$A'_{=} 5 A_{o}^{2}$

$I = A^{2}$

$I' = 25 I_{o}$

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