Origin of thermal radiation

by jjschwartz1
Tags: origin, radiation, thermal
jjschwartz1 is offline
Feb2-13, 05:17 PM
P: 2
I'm trying to understand the origin of thermal radiation. All things with a temperature emit electromagnetic radiation.

Every discussion I've found starts with that as a premise and then goes on to Wien's displacement law and Planck's law, etc which I follow.

But *why* do all things radiate? I've seen some hints that atoms in motion are constantly colliding and therefore accelerating and therefore the component charges are accelerating and emitting electromagnetic radiation. But I haven't seen it worked out in detail or mathematically.

And if that's the case, do a bunch of neutrons at room temperature radiate? They must. What's the explanation for that?
Phys.Org News Partner Physics news on Phys.org
Physicists design quantum switches which can be activated by single photons
'Dressed' laser aimed at clouds may be key to inducing rain, lightning
Higher-order nonlinear optical processes observed using the SACLA X-ray free-electron laser
mathman is offline
Feb2-13, 05:22 PM
Sci Advisor
P: 5,935
Neutrons don't radiated. They transfer energy by collision.

Register to reply

Related Discussions
origin of thermal radiation in humans. General Physics 4
Origin of IR radiation in living things ? Classical Physics 1
Thermal radiation Advanced Physics Homework 3
thermal radiation General Physics 3
Thermal Radiation Introductory Physics Homework 1