They have so much energy they can even get through sheets of metal. This is very useful if you want to look for cracks in aeroplane wings. It may be reflected, it may be absorbed, or it may pass straight through. When light is absorbed by an object the light energy is turned into heat energy or chemical energy. When leaves absorb light the energy is turned into heat and chemical energy.
Photosynthesis is the process by which green plants turn light energy into chemical energy.
Return to index Heat is another form of energy. At absolute zero -273 C the particles do not vibrate. I think that it is like this in outer space, but I have never been there to find out. When we heat something we make the particles move faster. Actually it is quite hot compared to outer space and the molecules in the ice are vibrating quite fast.