I was telling some of my friends about pinhole photography the other day, showing them my plastic 35mm film canister pinhole cameras and some photos I took with them. They all asked the question "Well how does that work?" I told them that all the light from outside the pinhole travels towards the pinhole and then spreads back out after passing through the pinhole, therefore creating the image. Then one of them said "But how does that work?" and I was at a loss for words - haha. So is there a more complicated science behind it or is it really as simple as what I told my friends? That's the only way I knew how to explain it. How have you explained pinhole photography to people that didn't know about it?