First slide

X-rays

Question

The energy ratio of two $K_{α}$ photons obtained in X-ray from two metal targets of atomic numbers $Z_{1}$ and $Z_{2}$ is

Moderate

A

$\frac{Z_{1}}{Z_{2}}$
B

${(\frac{Z_{1}}{Z_{2}})}^{2}$
C

${(\frac{Z_{1} - 1}{Z_{2} - 1})}^{2}$
D

$\sqrt{\frac{(Z_{1} - 1)}{(Z_{2} - 1)}}$

Solution

The energy of $K_{α}$ x-ray photons is directly proportional to $(Z - 1)^{2}$ .
The energy ratio of two $K_{α}$ photons obtained in x-ray from two metal targets of atomic numbers $Z_{1}$ and $Z_{2}$ is ${(\frac{Z_{1} - 1}{Z_{2} - 1})}^{2}$

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