Talk:Black body

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Former good article nomineeBlack body was a good articles nominee, but did not meet the good article criteria at the time. There are suggestions below for improving the article. Once these issues have been addressed, the article can be renominated. Editors may also seek a reassessment of the decision if they believe there was a mistake.
July 21, 2006Good article nomineeNot listed


Experimental Apparatus - Cavity with a Hole[edit]

Since the experimental apparatus of Lummer and Kurlbaum is central to real world attempts to create a blackbody, I feel this section should be expanded. Inclusion of a brief description of how the apparatus works and a figure would go a long ways to aiding reader comprehension. I am not knowledgeable enough about experimental physics to do this myself, so could someone with the background please expand this section? --BBUCommander (talk) 15:25, 19 August 2012 (UTC)

Definition of a white body[edit]

Why is a white body necessarily rough? Seems like this statement is not true and includes unnecessary detail. The roughness or smoothness of an ideal black body is not mentioned. neffk (talk) — Preceding undated comment added 15:24, 28 May 2015 (UTC)

A white body is necessarily rough in the sense that its surface is lambertian. It reflects every finite sized incoming pencil into every direction. A black body completely absorbs rays from every direction. If the "black" surface were not rough, but had a shine on it, it would not really be black. If a body that reflects is not rough, it is a specular reflector, and is even more shiny than polished silver, not white.Chjoaygame (talk) 11:30, 29 May 2015 (UTC)

undid faulty IP edit; reasons[edit]

I have undone a faulty IP edit.

There are two signs that a writer is cleverer than the reader: starting a sentence with 'actually'; and starting a sentence with 'however'. (Ordinary writers, however, use the word 'however' like this.)

The new material may perhaps, suitably re-written, be a useful addition to the article, but not as it was posted just now, directly in the lead. One guesses, perhaps mistakenly, that perhaps it was posted not by an ordinary Wikipedia editor, but by the enthusiastic author of the cited paper seeking self-promotion, with a risk of conflict of interest.

The material may perhaps, with some careful editing, be suitable to be posted in a section of the body of the article, and then may be considered for possible inclusion in a brief summary form in the lead.

No matter how much cleverer the poster than than the reader, the ordinary form of Kirchhoff's law does not need amendment. The law states the existence of a unique universal spectrum for thermodynamic equilibrium. That the posted material may contradict that would suggest that the posted material is not from a reliable source. Wikipedia does not admit in general that new research, in no matter how thoroughly peer-reviewed a journal, is adequately reliably sourced. The ordinary criterion for reliable sourcing is that the source be a secondary one, for example a respected textbook reporting other sources. At present, at a glance, it seems to me that the material is perhaps partly wrong because it does not agree with Kirchhoff's law; perhaps my first impression needs reconsideration.Chjoaygame (talk) 22:02, 20 January 2016 (UTC)

Ah, I see! My undo has been undone, 25 minutes after my undo. Evidently the undoer, the original poster, was so enthusiastic that he did not wait to read my talk-page reasons, which took me 32 minutes to write. Because that shows that the poster is new to Wikipedia editing, I will forbear for the moment from undoing his undo, so as to give him the opportunity to undo it himself. Anyhow, the original post will not stand. I suggest the poster, Editor IP 194.136.94.252, carefully read and consider my above talk-page reasons, and take advantage of my forbearance in not myself undoing his undo.Chjoaygame (talk) 22:17, 20 January 2016 (UTC)

I concur and have again removed the content from the lead. For something that necessitates the rewriting of long-standing, well-known laws of physics, we can wait until textbooks with the rewritten law have been published - or, at the very least, until secondary sources confirm the result. Huon (talk) 07:52, 21 January 2016 (UTC)

External links modified[edit]

Hello fellow Wikipedians,

I have just modified one external link on Black body. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

As of February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete the "External links modified" sections if they want, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{sourcecheck}} (last update: 15 July 2018).

  • If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
  • If you found an error with any archives or the URLs themselves, you can fix them with this tool.


Cheers.—InternetArchiveBot (Report bug) 12:38, 21 July 2017 (UTC)