Can we seperate Heat and Light? i.e Is light always accompanied by Heat? Is there somthing called "cold light"?
2007-01-02 14:20:44 · 3 answers · asked by stravis 2 in Science & Mathematics ➔ Physics
Heat is manifested as two distinct phenomenon, mechanical motion of atoms and electromagnetic radiation. Based on Planck's blackbody radiation law:
http://en.wikipedia.org/wiki/Black-body_radiation any object above absolute zero radiates electromagnetic energy. Light, which is more correctly, "visible" EM radiation therefore emanates from warm bodies.
What is typically called "cold" light, is radiation that's filtered to only passed visible light, but even visible light contains energy, and can therefore heat things up eventually.
2007-01-02 14:38:31 · answer #1 · answered by arbiter007 6 · 0⤊ 0⤋
If visible light passes through glass, water, or any other border with mass, it will loose some energy. Some of the light when it loses energy passes in to the spectrum of infra-red. This is what feels like heat.
If there is any sensor to search for heat, it is inevitable that some energy is lost and will become infra-red and thus heat. Therefore you can not find any light with out heat.
2007-01-02 22:43:46 · answer #2 · answered by eric l 6 · 0⤊ 0⤋
no light produces heat by rubbing particals together
2007-01-02 22:26:22 · answer #3 · answered by jack 3 · 0⤊ 1⤋