1.

The intensity of an X-ray beam reduces to `36.8%` of its initial intensity after traversing a gold film of thickness `5xx10^(-3)m`. Its absorption coefficient isA. `50 m^(-1)`B. `100 m^(-1)`C. `150 m^(-1)`D. `200 m^(-1)`

Answer» Correct Answer - D
`I=I_(0)e^(mux)`
0.368 `I_(0)=I_(0)e^(-mux)` `(e^(-1)=0.368)`
`mu=1//x =200`


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