First slide

X-rays

Question

The energy of a photon of characteristic X-rays from a Coolidge tube comes from

Easy

A

The kinetic energy of the striking electron
B

The kinetic energy of the free electrons of the target
C

The kinetic energy of the ions of the target
D

An electronic transition of the target atom

Solution

The energy of X-ray photon obtained from a Coolidge tube by an electronic transition of target atom such as $K_{α}$ line is obtained from transition from L orbit in K orbit.

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