Find the retarding potential required to stop electron of de-broglie wavelength 0.5 nm
2)eV=KE of electron
The Attempt at a Solution
Using the above three relations is giving me an incorrect answer for V, However in the hint it is mentioned that eV=hc/lambda.
I have four problems- 1)Why are the above relations giving an incorrect answer?
2) hf is the energy of a photon, can we use the same expression for an electron?
3)if yes, How did we obtain this expression?
4)the photon is massless, so is its de-broglie wavelength infinite?
I'd be grateful for your help