Talk:Black body

Black hole absorbs all and reflects none
Would it be more accurate to say black holes redshift light travelling from close to their event horizon, since light passing close to the black hole can still curve back to the observer? A star collapsing into a black hole will seem to slow down and settle around its schwarzschild radius and effectively become redshifted until we cannot detect any light coming from its surface, though light arguably will get emitted from its surface just above the event horizon indefinitely as observed from a safe distance. Since this is not the main topic of this article, I am unsure whether such nitpicking is really necessary, nevertheless the fact that black holes emit radiation can be entirely derived without ever mentioning events on or past the horizon, while a classical black hole which absorbs all and reflects none would not emit thermal radiation. 85.31.132.229 (talk) 18:49, 2 December 2020 (UTC)

What is it for?
The article starts out with "A black body or blackbody is an idealized physical body...". At that point it should say why anyone would want to idealize a body and here should be examples of what a "body" is. I'm not expert enough to add it myself, but something along the lines of "... that is used as a stand-in for actual physical objects, such as planets and humans, in order to simplify the math required to model them."

Math error?
At the time of writing this comment, the Black Holes section has a formula that drops the following error (in the Brave browser, running on macOS Big Sur):

Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "/mathoid/local/v1/":): {\displaystyle T=\frac {\hbar c^3}{8\pi Gk_\text{B}M} \ ,}

I'm not familiar enough with MathML or the  tag to be of any help, and my only hope is that someone who follows this page (or has it on their watchlist) is able to check it and correct the error.

Feel free to remove this message once the issue is fixed. — Gwyneth Llewelyn (talk) 19:17, 6 March 2023 (UTC)

Space to include band emission
The page for band emission could be easily slotted in to this article under Idealizations, though I don't know if there's enough there to warrant its own subheading or if it could be added under a heading like: Band emissions with justification of why measuring the emissions over a specific spectral band is useful. Reconrabbit (talk) 19:02, 11 December 2023 (UTC)