Question

A dentist’s x-ray tube has an accelerating voltage of 80 kV. What is the minimum wavelength x-ray produced?

Answer 1

We know that the maximum work done on the electron due to accelerating voltage

W=eV

The energy of the x-ray

Using work-energy theorem

Since

Here h=6.626×10^(-34) Js , c=3×10^8 m/s , e=1.6×10^(-19)C , V=80kV=80,000V ,

m

. Answer here p=10^{-12}