An X-ray tube is operated at 1.24 million volt. The shortest wavelength of the produced photon will be :

(2)

$\lambda_{\min }=\frac{h c}{\mathrm{eV}}$

$\lambda_{\min }=\frac{1240 \mathrm{~nm}-\mathrm{eV}}{1.24 \times 10^{6}}$

$\lambda_{\min }=10^{-3} \mathrm{~nm}$