The ancient Greek philosopher Plato had a cave metaphor: Someone was walking in the cave, fire light came in from outside the cave, and the shadow of the person was cast on the cave wall to flicker. Some people said that this is the beginning of the principle of light and shadow imaging in modern movies. Lightzey said that this is the testimony of the ancient people’s pursuit of the beauty of light.
Darwin wrote: Walking in the dark with a lamp, the light illuminates the pattern of the floor tiles, he goes forward, the light followed, so he sees different patterns, although they can not capture the complete impression, but they are constantly surprised. ——Lighting brings infinite fun.
Edison made countless inventions in his life, but the most popular is the electric light. The soft light of electric lamps makes people move freely in the dark. People love electric lights as much as they love the sun during the day.