if you can't explain it simply, you don't understand it well enough. albert einstein on white paper back

explain simply don#39aph39#t understand albert einstein white paper background physics theory relativity e mc² nobel prize quantum mechanics scientist genius theoretical special space-time light mass-energy equivalence photoelectric effect unified field atomic bomb gravitational waves time dilation brownian motion electromagnetism particle philosopher-scientist humanitarian germany swiss citizenship princeton university thought experiments scientific revolution legacy curiosity imagination antimatter cosmology black holes space exploration philosophy science cosmos energy mass curved inertia nature reality relativistic effects modern causality critical thinking method intellectual