Question

$X$-ray beam of intensity $I_0$ passes through an absorption plate of thickness $d$. If absorption coefficient of material of plate is $\mu$, the correct statement regarding the transmitted intensity $I$ of $X$-ray is :

• A. $I=I_0(I-e^{-\mu d})$
• B. $I=I_0{e}^{-\mu d}$
• C. $I=I_0(I-e^{d/\mu })$
• D. $I=I_0{e}^{-\mu /e}$

Answer 1

The correct option is B $I=I_0{e}^{-\mu d}$

When $X$-ray passed through an absorption plate of thickness $d$, then transmitted intensity

$I=I_0{e}^{-\mu d}$