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Light waves from two coherent sources having intensities `I and 2 I` cross each other at a point with a phase diff. of `60^(@)`. What is the resultant intensity at the point ? If the sources were incoherent, what would be the resultant intensity ?

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To solve the problem, we need to calculate the resultant intensity of light waves from two coherent sources with given intensities and a phase difference. We will also find the resultant intensity if the sources were incoherent. ### Step 1: Identify the Intensities and Phase Difference We have two coherent sources with intensities: - \( I_1 = I \) - \( I_2 = 2I \) The phase difference between the two sources is given as \( \phi = 60^\circ \). ...
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