Question

Q. Electrons are accelerated in a television tube through a
potential difference of 9.8 kV. Find the highest frequency and
minimum wavelength of the electromagnetic wave emitted,
when theses electrons strike the screen of the tube. In which
region of the spectrum will these waves lie?  

and

Q. High energy photons ( y -rays) are scattered from electrons initially at
rest. Assume the photons are backscatterred and their energies are much
larger than the electron’s rest-mass energy, E >> m₀c²

(a) Calculate the wavelength shift.
(b) Show that the energy of the scattered photons is half the rest mass
energy of the electron, regardless of the energy of the incident photons.
(c) Calculate the electron’s recoil kinetic energy if the energy of the
incident photons is 150 MeV.

Answer 1