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If 50.0 mm of a metal stops 95% of incident gamma rays, how much will 25.0...

If 50.0 mm of a metal stops 95% of incident gamma rays, how much will 25.0 mm stop?

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Answer #1

Emerging intensity of absorber by thickness L is

If the metal stops 95% of incident gamma rays,

for 50 mm stop, L=50 mm

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For 25 mm stop, L=25 mm

25 mm of a metal stops of incident gamma rays.

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