(a) What is the energy of a photon that has wavelength 0.10m? (b) Through approximately what potential...

Question:

(a) What is the energy of a photon that has wavelength 0.10µm?
(b) Through approximately what potential difference must electrons be accelerated so that they will exhibit wave nature in passing through a pinhole 0.10µm in diameter? What is the speed of these electrons?
(c) If protons rather than electrons were used, through what potential difference would protons have to be accelerated so they would exhibit wave nature in passing through this pinhole? What would be the speed of these protons?