QJEEM20Phb9e2: JEE Main 2020 Physics - Class 11 JEEM20Phb9e2 Solution: Three harmonic waves having equal frequency ν and same…

Question

Verified Solution • 2025–26 Session moderate

Three harmonic waves having equal frequency

ν

and same intensity

I_{0}

, have phase angles 0,

\frac{π}{4}

and

- \frac{π}{4}

respectively. When they are superimposed the intensity of the resultant wave is close to :

Accepted Answer

I₀ = CA²

A_R = A + A

\sqrt{2}

= A(1 +

\sqrt{2}

)

I_R = C

A_{R}^{2}

∴

I_R = CA²

{(\sqrt{2} + 1)}^{2}

= 5.8 I₀

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