Timeline for If an object has a temperature, does it have to radiate?
Current License: CC BY-SA 3.0
14 events
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| Apr 19, 2016 at 15:21 | comment | added | Carl Witthoft | @akhmeteli you're missing the point: all bodies with temperature radiate, and they deviate from the 'ideal' black-body curve depending on the quantum properties of the surface material. It's still radiating, and it will reach an equilibrium where it absorbs as much energy as it radiates (not necessarily the same total energy per wavelength!) | |
| Apr 19, 2016 at 6:08 | comment | added | knzhou | If you want a pure thermodynamics explanation, the Second Law requires that everything that can absorb radiation (and a black hole certainly can) must emit it. More details are in this question. | |
| Apr 19, 2016 at 5:01 | comment | added | Farcher | Similar question? physics.stackexchange.com/questions/59213/… | |
| Apr 19, 2016 at 4:59 | answer | added | anna v | timeline score: 1 | |
| S Apr 19, 2016 at 4:49 | history | suggested | user113914 | CC BY-SA 3.0 |
improved formatting
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| Apr 19, 2016 at 4:18 | review | Suggested edits | |||
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| Apr 19, 2016 at 3:45 | comment | added | akhmeteli | @MaxW: "all bodies with a temperature would radiate black body radiation" - maybe I missed something, but this does not seem correct: not all bodies are black bodies, and their radiation may be different from that of a black body. | |
| Apr 19, 2016 at 3:44 | comment | added | CuriousOne | Thermodynamics is valid for matter and radiation and both have to come to an equilibrium state. | |
| Apr 19, 2016 at 3:39 | comment | added | hdhondt | Every body with a temperature above 0K radiates | |
| Apr 19, 2016 at 3:36 | history | edited | whatwhatwhat | CC BY-SA 3.0 |
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| Apr 19, 2016 at 3:36 | comment | added | whatwhatwhat | Is this true of all objects with a temperature? | |
| Apr 19, 2016 at 2:56 | comment | added | whatwhatwhat | and the knowledge that all bodies with a temperature would radiate black body radiation - why must this be true? | |
| Apr 19, 2016 at 2:43 | comment | added | MaxW | from the Wikipedia article on Hawkins radiation "Hawking radiation is black-body radiation that is predicted to be released by black holes, due to quantum effects near the event horizon. ..." en.wikipedia.org/wiki/Hawking_radiation So the insight was to consider that a black hole would have a temperature, and the knowledge that all bodies with a temperature would radiate black body radiation. | |
| Apr 19, 2016 at 2:30 | history | asked | whatwhatwhat | CC BY-SA 3.0 |