Some chemical or electrical reactions can create light without getting hot. A good example of that is the light from a firefly. We can see that light comes from the sun, moon, and stars. It comes from fires, light bulbs, lightning, as well as from hot things that are glowing. Personal observations concerning light The first thing we want to do is to take a closer look at light in the world around us.
Light consists of different colors, as seen in a rainbow.
It can have different brightness intensities. It can be focused by a lens or curved mirror. Light seems to travel in rays or beams. Light gets someplace almost instantaneously. Its speed is very fast.