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...energy, thanks to E = mc²) follow these straight paths in curved space. The experimental proof of this occurred during a solar eclipse in 1919 where starlight was observed to be bent by the sun. The amount of bending was predicted by Einstein, and not by the standard “Newtonian” theory. So matter follows the curvature of space, but we know matter is the source of...

...energy of what they are being transported in is pretty constant. Grains vary between being 1mm and 10cm in size. A ‘poorly sorted’ texture indicates the energy of what they are being transported in varies in time and space – sometimes it can move big heavy grains, other times only smaller grains. Environment of deposition. Sandy beach material that has been...

...Energy levels are demonstrated in the context of a sodium lamp in Video 3. Watch it now and then do Activity 4. HELEN: So in the last experiment, we absolutely established that light can behave as a wave, but now we're going to show you something that shows that also lights can behave as a particle. So here I have an experiment which actually OU students get a chance to...