Question

A potential difference of 20 KV is applied across an X-ray tube. Find the minimum wavelength of X-ray generated.

Answer 1

$E={eV}_0=\frac{hc}{\lambda }$

Given $V_0=2\times {10}^{4}V1.6\times {10}^{-19}\times 2\times {10}^4=\frac{6.626\times {10}^{-34}\times 3\times {10}^8}{\lambda }\lambda =\frac{6.626\times {10}^{-34}\times 3\times {10}^8}{3.2\times {10}^{-15}}=6.21\times {10}^{-11}m=0.621A^{\bullet }$