Free points to those who rate this 5 stars and answer "Done". I don't think it lets more than 2 people answer so I guess the first 2 people who answer, get the points.

What is the major limitation to the light microscope?

Photons with the highest energy have the longest period

Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?