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JEE PHYSICS MCQ: WAVE OPTICS

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Application +4 | -1

The intensity of gamma radiation from a given source is

I

. On passing through

36\;mm

of lead, it is reduced to

{I/8}

. The thickness of lead which will reduce the intensity to

{I/2}

will be

View answer and explanation

Correct option: B

12\;mm

Option B (

12\;mm

) is correct because it is derived from the exponential decay law for radiation intensity.

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