Question

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

(1) 10^–3 nm 

(2) 10^–1 nm

(3) 10^–2 nm

(4) 10^–4 nm

Answer 1

(1) 10^–3 nm

λ_min = \(\frac{1240}{ΔV}\)(nm)

= \(\frac{1240}{1.24\times10^6}\)  = 10^-3nm