JEE PHYSICS MCQ: RAY OPTICS

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A small source of light is to be suspended directly above the centre of a circular table of radius

R

. What should be the height of the light source above the table so that the intensity of light is maximum at the edges of the table compared to any other height of the source

View answer and explanation

Correct option: B

\frac{R}{{\sqrt 2 }}

Option B (

\frac{R}{{\sqrt 2 }}

) is correct because it represents the height at which the intensity of light at the edge of the table is maximized, derived by differentiating the intensity with respect to height and setting it to zero.

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