If the waves are **coherent**, then the resultant intensity is given by

I = I_{1} + I_{2} + 2 √(I_{1} I_{2} Cos Θ), where Θ is the phase difference between two waves.

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# Tag: algebraic method

## Coherent and incoherent addition of waves

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If the waves are **coherent**, then the resultant intensity is given by

I = I_{1} + I_{2} + 2 √(I_{1} I_{2} Cos Θ), where Θ is the phase difference between two waves.

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