The X-ray coming from a Coolidge tube has a cutoff wavelength of 80 pm. Find the kinetic energy of the electrons hitting the target.

Given:


Cutoff wavelength of the Coolidge tube,


λ=80pm
Energy of the electron hitting the target


E is given by



Here,


h=Planck’s constant
c = Speed of light


λ= Wavelength of light




≈15.5 keV


1