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Electrons with energy 80 keV are inciden...

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

A

A continuous X - ray spectrum (Bremsstrahlung ) with a minimum wavelength of ~ 0.155 Å

B

A continuous X - ray spectrum (Bremstrahlung ) with all wavelengths

C

The characteristic X-rays spectrrum of tungsten

D

A continuous X - ray spectrum (Bremsstrahlung with a minimum wavelength of ~ 0.155 Å and the characteristic X - ray spectrum of tungsten

Text Solution

Verified by Experts

The correct Answer is:
D
`lambda_("min) (Å )=(12375)/(E(eV))=(12375)/(80xx10^(3)) = 0.155Å`
Also characteristic X - ray spectrum of tungsten will be obtained because , energy of incident electron is more than ionization energy .
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