Q 1276680576.     `K`-shell electrons of tungsten have energy `72.5` keV. Electrons with energy `80` keV are incident on the tungsten target of an X-ray tube. X-rays emitted by the tube contain only

JEE-MIS
A

a continuous X-ray spectrum (Bremsstrahlung) with all wavelengths

B

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

C

the characteristic X-ray spectrum 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

HINT

`λ_text(min)` (in Å) `= 12375/(E(text( in ) text( eV )))`

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