Do photons have Temperature?

Space/Science » in reply to re: Would your total vacuum exclude photons?

Do photons have Temperature?

nick hoffman — 4/20/2008 9:30:17 AM (archived)

No, not in the accepted sense BUT, they interact with matter that DOES have temperature and change their spectrum to an appropriate black body.

However, the rate of interaction depends on matter density and these attenuated high-enargy plasmas are very thin and therefore interact only weakly with photons...

The whole thread (36 posts)

I wonder why - Johannes - 4/17/2008 8:33:33 PM
- "Hot" in this context relates to particle velocities, not "temperature" as such. (n/t) - TB - 4/18/2008 12:41:04 AM
  - Hot IS particle velocity in this context. - et - 4/18/2008 5:50:17 PM
    - So, if you create a total vacuum, what's the temperature inside it? (n/t) - RobVG - 4/19/2008 1:08:41 AM
      - Temperature measures the thermal energy in a volume. - et - 4/19/2008 8:13:45 PM
      - That's like asking what the pressure is. - TB - 4/19/2008 2:03:36 AM
      - re: Would your total vacuum exclude photons? - Johannes - 4/19/2008 1:46:08 AM
        
        Found will looking for something else. - RobVG - 4/22/2008 6:14:16 PM
        
        "while" -(shees, sometimes forget to look at what I typed) (n/t) - RobVg - 4/22/2008 10:47:28 PM
        
        re: "while" -(shees, sometimes forget to look at what I typed) (n/t) - hafid - 4/29/2008 9:44:43 PM
        
        Do photons have Temperature? - nick hoffman - 4/20/2008 9:30:17 AM
        
        Google photon gas. (n/t) - et - 4/19/2008 8:11:34 PM
        
        Do photons have mass? (n/t) - RobVG - 4/19/2008 2:01:05 AM
        
        Johannes, this is a SCIENCE board, NOT religion - Moderator Nick - 4/20/2008 9:35:35 AM
        
        re: Sorry about the conflict, butâ€¦â€¦.. - Johannes - 4/21/2008 2:09:42 AM
        
        Not in the conventional sense. (n/t) - et - 4/19/2008 8:10:01 PM
        
        Radiometers and solar sails don't work if light has no mass to plug into the momentum equation. (n/t) - alcaray - 4/19/2008 8:38:47 PM
        
        Photons have no mass, but they do have momentum, and it is conserved. (n/t) - ER - 4/20/2008 1:19:28 AM
        
        I stand corrected. (Though I don't understand it. The quantum world is very odd.) (n/t) - alcaray - 4/20/2008 2:23:04 AM
        
        Photons are electric and magnetic field packets. - et - 4/21/2008 8:04:54 PM
        
        re: How is the momentum of a photon generated? (n/t) - Johannes - 4/20/2008 1:35:55 AM
        
        Starship sailors - ER - 4/20/2008 3:05:06 AM
        
        re: Epiphenomena yes but - Johannes - 4/21/2008 1:42:19 AM
        
        Epiphenomena yes, period. - ER - 4/21/2008 1:45:13 PM
        
        re: How and why. - Johannes - 4/21/2008 10:49:31 PM
        
        re: How and why. - ER - 4/22/2008 12:46:37 AM
        
        re: Thank you for your explanation. - Johannes - 4/22/2008 2:48:21 AM
    - re: In other words, diffuse and high in kinetic energy. (n/t) - Johannes - 4/18/2008 8:10:52 PM
    - I remember this from junior high school - TB - 4/18/2008 6:36:44 PM
  - re: - yep, charged particles. - Marcia - 4/18/2008 2:04:46 AM
    - re: - Thanks for the info - Johannes - 4/18/2008 3:13:04 AM
      - There's a LOT you don't understand. - nick hoffman - 4/18/2008 3:18:27 AM
        
        Gentlemen, gentlemen,,, - ER - 4/20/2008 2:48:01 PM
        
        Feynmann and others - TB - 4/20/2008 7:23:38 PM
        
        re: There's a LOT you don't understand. - Johannes - 4/18/2008 8:07:58 PM
        
        Him and me both. - et - 4/18/2008 5:49:04 PM

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