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Two light sources have intensity of lig...

Two light sources have intensity of light as `I_(0)`, What is the intensity at a point where the two light waves have a phase difference of `pi//3`?

Text Solution

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Let the intensities be `I_(0)`.
The resultant intensity is, `I = 4I_(0) cos^(2)(varphi/2)`
Resultant intensity when, `phi = pi//3`, is `I = 4I_(0) cos^(2)(pi//6)`
`I = 4I_(0)(sqrt(3)//2)^(2) = 3I_(0)`
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