- #1
DoobleD
- 259
- 20
If you heat something by radiation, its temperature increases, which means there is an increase of the average velocity of the atoms the "something" is made of.
Another thing which happens when radiation hit the object, is that its atoms can "absorb" photons, as electrons go to higher energy states, and similary the nuclei go into excited states.
So my question is basically : how the speed of the atoms increase when they receive photons ? I mean, I suppose the gained kinetic energy is not the same thing as the energy gained by going into excited states (or is it ?). Is there then a mechanism by which the ernegy of a photon is somehow converted into kinetic energy for the atom ?
For heat conduction (and convection), I can understand that collisions between atoms of the hot and cold bodies transfer kinetic energy. I'm curious of how this works with radiation.
Another thing which happens when radiation hit the object, is that its atoms can "absorb" photons, as electrons go to higher energy states, and similary the nuclei go into excited states.
So my question is basically : how the speed of the atoms increase when they receive photons ? I mean, I suppose the gained kinetic energy is not the same thing as the energy gained by going into excited states (or is it ?). Is there then a mechanism by which the ernegy of a photon is somehow converted into kinetic energy for the atom ?
For heat conduction (and convection), I can understand that collisions between atoms of the hot and cold bodies transfer kinetic energy. I'm curious of how this works with radiation.
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