Black Body in Motion Books: Find & Learn Relativity

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Discussion Overview

The discussion revolves around the concept of black bodies in motion, particularly in the context of relativity. Participants are seeking resources or literature that address how the properties of black bodies, which absorb all incident light, are affected when they are in motion. The inquiry includes a focus on the implications of relativistic effects on the black body spectrum.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant expresses difficulty in finding books specifically addressing black bodies in motion and seeks guidance on the topic.
  • Another participant mentions that popular authors have not covered this topic, suggesting that Doppler shifting might be relevant but notes that simply scaling frequencies is insufficient for calculating the spectrum of a moving black body.
  • A participant references a Wikipedia article on the Doppler effect for a moving black body as a starting point for further exploration.
  • There is a challenge regarding the initial claim that no examples of black bodies in motion exist, with a participant pointing out that stars, which can be considered black bodies, are indeed in motion.
  • A later reply acknowledges that stars can be classified as black bodies in motion, indicating a shift in understanding or clarification of the initial statements.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the availability of literature regarding black bodies in motion. There is disagreement about the initial claim that no examples exist, as some participants argue that stars qualify as black bodies in motion.

Contextual Notes

The discussion highlights the complexity of applying relativistic principles to black body radiation and the potential limitations in existing literature. There are unresolved aspects regarding the mathematical treatment of moving black bodies and the implications of Doppler effects.

kthouz
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Hello!
I am looking for books about black body in motion but i can't find any in Google. So, does anyone know something about it and let me know? Just even the address of where i can find it is enough.
Actually, the black body that i know is the one which absorbs all incident light (emissivity = 1). I learned this in quantum mechanics. And now i want to know how relativity deals with it and especially when the Black body is in motion.
Please help!
 
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HELLO!
Have not seen anything like that in recent popular books by Hawking, Susskind, Smolin, Greene, Randall, Ferreira, Seife, Kaku, Steinhardt & Turok, Bergmann.

My first thought was "maybe doppler shifting takes care of it" ...but that was quickly shot down:
To calculate the spectrum of a moving black body, then, it seems straightforward to simply apply this formula to each frequency of the blackbody spectrum. However, simply scaling each frequency like this is not enough...

from Wikipedia:
http://en.wikipedia.org/wiki/Black_body#Doppler_effect_for_a_moving_black_body

Check it out for a start.

And it may be other sections of that article has a reference of interest to you.
 
Naty1 said:
HELLO!
Have not seen anything like that in recent popular books by Hawking, Susskind, Smolin, Greene, Randall, Ferreira, Seife, Kaku, Steinhardt & Turok, Bergmann.

My first thought was "maybe doppler shifting takes care of it" ...but that was quickly shot down:


from Wikipedia:
http://en.wikipedia.org/wiki/Black_body#Doppler_effect_for_a_moving_black_body

Check it out for a start.

And it may be other sections of that article has a reference of interest to you.

I'm a bit puzzled by your answer and wonder if you understand your own posts.

In https://www.physicsforums.com/showpost.php?p=2294495&postcount=7", you cited something that clearly stated that ".. stars and black holes are also black bodies..."

Yet, when the OP asked for "black body in motion", you didn't cite such examples and in fact stated that you've never seen anything like that <scratching head>. Stars ARE in motion across our sky. If they can be considered as black bodies, then they ARE "black bodies in motion", are they not?

Zz.
 
Last edited by a moderator:
ZapperZ said:
Yet, when the OP asked for "black body in motion", you didn't cite such examples and in fact stated that you've never seen anything like that <scratching head>. Stars ARE in motion across our sky. If they can be considered as black bodies, then they ARE "black bodies in motion", are they not?

Zz.
that's right stars can be considered as black body in motion. thanks a lot for your help!
 

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