Light Light is a form of energy that is perceived by the eye. Light allows us to see things light source light source means something to cause light to be broken into 3 categories: 1. caused by natural light, like the sun, the stars, some of the light from the sun is a lightning. light sources, the largest two. Light from animal to animal in itself, such as the fireflies light 3. light candles as humans invented the electric lamp light caused by the burning of light traveling from the light source speeds. By traveling 186,000 miles per second, or 300,000 kilometers per second, the light will travel in a straight line. And travel through a vacuum, as light from the sun to the Earth. By vacuum Through the air at the Earth where the sun takes 8 minutes away from our planet 93 million miles an optical medium of light means objects blocking the passage of light, divided into three categories: 1. intermediaries transparent means. middleware that allows light to pass through it like clear water, clear air, clear plastic, glass, 2. intermediary translucent light through an intermediary means to be good. But through it out, such as water or glass opaque haze, etc. 3. an optical recording medium means that the light is not at all like zinc, tile, mirrors etc. The refraction of light when traveling through intermediaries only. To travel in a straight line When light travels through a medium one. To another intermediary With different densities Refraction occurs as light travels through the air from the water. Or from air to water. Turning to the straight boundary.
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