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light is the only form of energy that we can see directly with our own eyes in fact without light energy we wouldnt be able to see anything at all we would live in a world of Darkness most of our light energy comes from the sun without this powerful source of energy nothing would be able to survive on Earth light energy travels in waves called electromagnetic waves there are other types of electromagnetic waves too for example radio waves microwaves and x-rays are also types of electromagnetic waves we cannot see these other types of electromagnetic waves we can only see visible light some wavelengths of visible light are longer than others this causes the light rays to have different colors without light energy there would be no color light rays travel very quickly the speed at which light travels is called the speed of light the speed of light is a fixed speed which means it does not change light always travels at 186 282 miles per second that is incredibly fast if you could travel