radiation

[7bear]

Heat can be transferred ny radiation. In-fra red radiation is emitted
in pocess. Is the speed of In-fra red radiation emitted by all substances are the same?[?]

[Integral]

Yes, Infrared is electroMagnetic energy therefore it travels at c, the speed of light.

[russ_watters]

Originally posted by Integral
Yes, Infrared is electroMagnetic energy therefore it travels at c, the speed of light. His post wasn't all that clear - perhaps he meant the rate of energy radiation, not the speed of the photons themselves. In that case, the answer is no - it depends on the material and temperature.