Asked in SciencePhysics
Why are light and heat not considered matter?
June 04, 2015 2:52PM
What i understand is that there is noting call "Light" or "Heat" its just the "Space",. "Space" created between sub atomic particles and atom we understand and call it "Light" and our eye recognizes it - and "Space" created between atom, molecules and cells we feel it and call it "Heat" - our cells / skin feels it
IF "Light" is a "particle" or "wave" then you should not see the same star from just one feet away -
your eye should loose the particle as it should have gained a little space during its million kilometer journey.
OLD reply >>
Light (including all forms of electromagnetic radiation) is not considered matter because it has no rest mass. Heat doesn't have rest mass either, in fact it is nothing other than the random motion of atoms. These things have energy. They interact with other stuff. But they aren't matter because they aren't what material objects are made up of.
Alternatively: Light and heat are not tangible things that you can see, touch or weight. One can not chemically isolate atoms of heat or light.
There is no official answer to this question because everyone just takes is as a given fact.