1. How do we observe what goes through in a slit in the double slit experiment? If this is accomplished with EM that goes across the slit, then why does the electron not completely change its direction before it hits the wall. It still always hit the wall where you expect it to, even though the photon collides with the electron that goes through the slit. 2. Can you reproduce this double split experiment with shooting through photons and neutrinos instead of electrons? 3. Say I use an extremely powerful optical microscope to zoom into matter. After what scale will I not see colors anymore? Will this be a continual process (i.e., the color fades more and more almost continuously) or does the colors simply vanish at some critical point? 4. Lets say there were a machine that could produce EM at different wavelengths and I dial it more and more into the shorter wavelangths from the visible light onwards (in a dark room). After a certain wavelength has passed (700nm), will it suddenly go dark or will I still see some violet until is slowly vanishes? (I assume the answer to this answer the question on the infrared side as well.) 5. Why do we use microwaves to heat food and not infrared? 6. Why do microwaves cause cancer and infrared does not? (should have asked this in the bio section probably).