Wave Optics – JEE Main Previous Year Questions with Solutions

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An initially parallel cylindrical beam travels in a medium of refractive index $\mu(\mathrm{I})=\mu_{0}+\mu_{2} \mathrm{I}$, where $\mu_{0}$ and $\mu_{2}$ are positive constants and I is the intensity of the light beam. The intensity of the beam is decreasing with increasing radius.