1. The problem statement, all variables and given/known data Microscopes are inherently limited by the wavelength of the light used. How much smaller (in order of magnitude) can we “see” using an electron microscope whose electrons have been accelerated through a potential difference of 50 000 V than using red light (500 nm)? 2. Relevant equations Here's the problem... I have a vague reference to (theta)N*0.002 radians, but since this isn't even an equation, I don't know if it's helpful. My lecturer puts no effort into notes at all. 3. The attempt at a solution Herein lies the problem, I don't know where to start, since it's mostly just a plug and chug problem, and I don't know the equation. Any pointers would be hugely appreciated!