The characteristic X-ray radiation is emitted when

Easy

A

the electrons are accelerated to a fixed energy
B

the source of electrons emits mono energetic beam
C

the bombarding electrons knock out electrons from the inner shell of the target atoms and one of the outer electrons falls into this vacancy
D

the valence electrons in the target atoms are removed as a result of collision

Solution

characteristic X ray is produced when high energy electron penetrate an atom and knock out electron from the inner orbit and to occupy the inner level when electron jumps into the inner orbit and produce xray radiation.

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