Etendue: Revision history

25 June 2024

• curprev 07:4307:43, 25 June 2024‎ Cosmia Nebula talk contribs‎ 22,081 bytes +1,253‎ →‎Conservation: thermodynamics undo Tag: Visual edit

14 June 2024

• curprev 13:5913:59, 14 June 2024‎ 87.254.79.45 talk‎ 20,828 bytes +9‎ No edit summary undo Tags: Mobile edit Mobile web edit

5 December 2023

• curprev 05:0005:00, 5 December 2023‎ Me, Myself, and I are Here talk contribs‎ 20,819 bytes −4‎ →‎Conservation of basic radiance: consistency in diacritics undo Tags: Mobile edit Mobile web edit Advanced mobile edit
• curprev 04:5904:59, 5 December 2023‎ Me, Myself, and I are Here talk contribs‎ 20,823 bytes −11‎ →‎Conservation: Simplify undo Tags: Mobile edit Mobile web edit Advanced mobile edit
• curprev 04:5804:58, 5 December 2023‎ Me, Myself, and I are Here talk contribs‎ 20,834 bytes −8‎ →‎As a volume in phase space: Simplify heading undo Tags: Mobile edit Mobile web edit Advanced mobile edit
• curprev 04:5004:50, 5 December 2023‎ Me, Myself, and I are Here talk contribs‎ 20,842 bytes 0‎ →‎See also: alpha undo Tags: Mobile edit Mobile web edit Advanced mobile edit

2 December 2023

• curprev 17:3017:30, 2 December 2023‎ Citation bot talk contribs‎ 20,842 bytes +40‎ Alter: template type. Add: isbn, pages. Removed Template redirect. | Use this bot. Report bugs. | #UCB_CommandLine undo

1 November 2023

• curprev 15:3315:33, 1 November 2023‎ Cmglee talk contribs‎ 20,802 bytes +66‎ →‎top: Add diagram of conservation of etendue undo

24 October 2023

• curprev 01:3701:37, 24 October 2023‎ Fgnievinski talk contribs‎ 20,736 bytes +12‎ removed Category:Optics; added Category:Optical quantities using HotCat undo

8 October 2023

• curprev 00:0800:08, 8 October 2023‎ Sbb talk contribs‎ 20,724 bytes +1,075‎ cleaned up all refs; {{cite}} templates for refs; {{page needed}} for books lacking a page ref; {{better source needed}} for Wikibooks cite undo Tag: 2017 wikitext editor

7 October 2023

• curprev 20:2520:25, 7 October 2023‎ Sbb talk contribs‎ 19,649 bytes +551‎ {{math}}/{{mvar}} for inline maths throughout, for consistency undo Tag: 2017 wikitext editor

29 September 2023

• curprev 13:4313:43, 29 September 2023‎ 204.194.77.5 talk‎ 19,098 bytes +7‎ →‎Brightness theorem undo

24 May 2023

• curprev 11:5911:59, 24 May 2023‎ Materialscientist talk contribs‎ m 19,091 bytes −121‎ Reverted edits by Mekaminski (talk): addition of unnecessary/inappropriate external links (HG) (3.4.12) undo Tags: Huggle Rollback
• curprev 11:5711:57, 24 May 2023‎ Mekaminski talk contribs‎ m 19,212 bytes +121‎ →‎Further reading undo Tags: Reverted Visual edit: Switched

3 March 2023

• curprev 15:5415:54, 3 March 2023‎ A Doon talk contribs‎ m 19,091 bytes −2‎ →‎Brightness theorem: Spelling fix undo Tag: Visual edit

20 November 2022

• curprev 17:1917:19, 20 November 2022‎ 70.82.201.24 talk‎ 19,093 bytes −3‎ →‎Conservation of etendue: removed a partially repeated word (onto to) in the first line undo

31 October 2022

• curprev 15:1415:14, 31 October 2022‎ OlliverWithDoubleL talk contribs‎ m 19,096 bytes +76‎ No edit summary undo Tags: Mobile edit Mobile app edit

13 September 2022

• curprev 17:0817:08, 13 September 2022‎ Geoffrey.landis talk contribs‎ 19,020 bytes −109‎ cut mention of phase-conjugating mirrors: true, but too far off this topic. undo
• curprev 17:0217:02, 13 September 2022‎ Geoffrey.landis talk contribs‎ 19,129 bytes +52‎ moved section integrating the differential etendue to the definition of etendue, instead of the conservation of etendue undo
• curprev 16:3916:39, 13 September 2022‎ Geoffrey.landis talk contribs‎ 19,077 bytes +1,199‎ added introductory-level statement of what conservation of etendue is, and added a section mentioning the brightness theorem undo
• curprev 16:1416:14, 13 September 2022‎ Geoffrey.landis talk contribs‎ 17,878 bytes +21‎ Definition here is differential etendue, not total etendue: to get etendue you need to integrate. undo

13 April 2022

• curprev 03:3603:36, 13 April 2022‎ Srleffler talk contribs‎ 17,857 bytes −44‎ Rv. That doesn't fit well in the lede. That sentence is just defining terms; A and Omega are not yet defined; there is nothing to approximate yet there. Work it into the body of the article, if necessary. undo Tag: Undo

12 April 2022

• curprev 03:3703:37, 12 April 2022‎ 2600:1700:78aa:510:ec0f:2e98:5593:461e talk‎ 17,901 bytes +44‎ It is very important to clarify that AΩ only applies to small paraxial situation, please refer to Nonimaging optics (Winston Minano Benitez, equation 2.7 and note 5 on the same page). undo Tags: Reverted Visual edit

19 February 2022

• curprev 04:5504:55, 19 February 2022‎ Fgnievinski talk contribs‎ 17,857 bytes +134‎ →‎top undo

19 December 2021

• curprev 04:2704:27, 19 December 2021‎ Srleffler talk contribs‎ m 17,723 bytes +1‎ Reverted edits by 178.220.41.124 (talk) to last version by Srleffler undo Tag: Rollback

18 December 2021

• curprev 19:0119:01, 18 December 2021‎ 178.220.41.124 talk‎ 17,722 bytes −1‎ →‎Definition undo Tag: Reverted

4 October 2021

• curprev 02:1502:15, 4 October 2021‎ Srleffler talk contribs‎ m 17,723 bytes +5‎ need a noun here. undo

2 October 2021

• curprev 19:3419:34, 2 October 2021‎ Jrtuenge talk contribs‎ m 17,718 bytes +371‎ Providing additional support for my previous edits. undo

1 October 2021

• curprev 03:4103:41, 1 October 2021‎ Jrtuenge talk contribs‎ m 17,347 bytes +230‎ Properly formatting (https://en.wikipedia.org/wiki/Wikipedia:Citation_templates) the two References I had previously added. undo

24 September 2021

• curprev 15:5115:51, 24 September 2021‎ Jrtuenge talk contribs‎ m 17,117 bytes −1‎ Consolidating the synonym paragraphs. undo

18 September 2021

• curprev 20:1920:19, 18 September 2021‎ Srleffler talk contribs‎ 17,118 bytes −73‎ Rm geometric extent from the list of synonyms since it isn't, and identify the other listed names as synonyms again. Any that aren't should be removed, or explained. WP:MOSBOLD. undo
• curprev 19:2219:22, 18 September 2021‎ Jrtuenge talk contribs‎ 17,191 bytes +543‎ Etendue is equal to optical extent, not geometric extent. It can also be expressed in units of square meters times steradians. I've cited the CIE definition ("expressed in square metre times steradian") and SI Brochure ("to interpret the supplementary units in the SI, namely the radian and the steradian, as dimensionless derived units, the names and symbols of which may, but need not, be used in expressions for other SI derived units, as is convenient") for support. undo

21 April 2021

• curprev 20:4320:43, 21 April 2021‎ TreyGreer62 talk contribs‎ m 16,648 bytes +50‎ →‎In free space undo

26 December 2020

• curprev 04:3104:31, 26 December 2020‎ Arielco talk contribs‎ 16,598 bytes −11‎ →‎Conservation of etendue: Replaced Etendue.png -> Etendue.svg undo

28 July 2020

• curprev 05:0205:02, 28 July 2020‎ Vonfraginoff talk contribs‎ 16,609 bytes +277‎ →‎Further reading: added XKCD's Fire from Moonlight undo

18 June 2020

• curprev 05:0805:08, 18 June 2020‎ Srleffler talk contribs‎ 16,332 bytes −42‎ Rv. That's not Lambert's cosine law, it's just geometry. When you project an area onto a plane perpendicular to a direction, you get the original area times cos theta, where theta is the angle between the area's normal and the specified direction. undo
• curprev 00:4600:46, 18 June 2020‎ Andrew Davies talk contribs‎ 16,374 bytes 0‎ →‎Definition undo

17 June 2020

• curprev 11:2911:29, 17 June 2020‎ Jack Hogan talk contribs‎ m 16,374 bytes +42‎ No reason was specified for why a transmission, reflection or emission from dS would be attenuated according to cos theta undo

28 April 2020

• curprev 14:4014:40, 28 April 2020‎ Opencooper talk contribs‎ 16,332 bytes +420‎ Proper math indentation undo

31 March 2020

• curprev 06:3106:31, 31 March 2020‎ Rahul Narain talk contribs‎ m 15,912 bytes +9‎ Added link to Gaussian beam undo

25 October 2019

• curprev 18:4618:46, 25 October 2019‎ Lasercist talk contribs‎ 15,903 bytes +99‎ Defined the radiant flux, Phi_e, which was previously not defined in this article. It appears this section was copied over from the "Radiance" Wikipedia article, wherein this definition was given in a previous section. undo

9 October 2019

• curprev 17:4517:45, 9 October 2019‎ 150.135.165.47 talk‎ 15,804 bytes −24‎ No edit summary undo

3 July 2018

• curprev 04:0804:08, 3 July 2018‎ BoP talk contribs‎ 15,828 bytes +75‎ Inserted the relationship to the BPP undo Tag: 2017 wikitext editor

29 May 2018

• curprev 07:5307:53, 29 May 2018‎ Wrongfilter talk contribs‎ 15,753 bytes +4‎ →‎Maximum concentration: more spaces to better separate two-letter variable names undo

28 May 2018

• curprev 19:5719:57, 28 May 2018‎ Wrongfilter talk contribs‎ 15,749 bytes +14‎ →‎In free space: spaces to improve readability undo

11 October 2017

• curprev 23:3823:38, 11 October 2017‎ OgreBot talk contribs‎ m 15,735 bytes +2‎ Replacing File:Etendue-Refraction.png with Commons version File:Etendue in refraction.png (report errors here) undo
• curprev 23:3823:38, 11 October 2017‎ OgreBot talk contribs‎ m 15,733 bytes +3‎ Replacing File:Etendue-Optical Momentum.png with Commons version File:Etendue and optical momentum.png (report errors here) undo
• curprev 23:3823:38, 11 October 2017‎ OgreBot talk contribs‎ m 15,730 bytes +5‎ Replacing File:Etendue-Large solid angle.png with Commons version File:Etendue for a large solid angle.png (report errors here) undo
• curprev 23:3823:38, 11 October 2017‎ OgreBot talk contribs‎ m 15,725 bytes +26‎ Replacing File:Etendue-Ideal Concentration.png with Commons version File:Etendue conservation at maximum possible concentration.png (report errors here) undo
• curprev 23:3823:38, 11 October 2017‎ OgreBot talk contribs‎ m 15,699 bytes +34‎ Replacing File:Etendue-Definition.png with Commons version File:Etendue for differential surface element in 2D and 3D.png (report errors here) undo