Electrons with energy `80 keV` are incident on the tungsten target of an X - rays tube , k- shell electrons of tungsten have `72.5 keV` energy X- rays emitted by the tube contain only

Options

A. a continuous X-ray spectrum with a minimum wavelength of `0.155 Å`
B. a continuous X-ray spectrum with all wavelengths
C. a characteristic X-ray spectrum of tungsten
D. a continuous X-ray spectrum with a minimum wavelength of `0.155 Å` and a characteristic X-ray spectrum of tungsten

Answer

D