Characteristic x-rays can be produced by bombarding targets with electrons. These x-rays occur when A) electrons from higher shells fill the vacant lower shell B) electrons fill the vacant valence shell C) photons are emitted with energies on the order of 10³ eV D) photons are emitted with wavelengths on the order of 10³ nm

Question

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Characteristic x-rays are produced when an electron from an outer shell drops down to fill a vacancy in an inner shell. The energy released in this process is emitted as a characteristic x-ray.

Characteristic X-Rays Can Be Produced by Bombarding Targets with Electrons