Talk:Invisibility

message: Hi, we would like to propose a new section (Invisibility without cloaking). Our research group discovered a new physical phenomenon that allows the direct fabrication of invisible structures and invisible photonic circuits. It has been recently published with Nature in Light: Science & Applications. Prior to our work, theoretical and experimental results that show advances in the field of invisibility use cloaking technologies, as reported in the first section of the wikipedia Invisibility article titled "Practical efforts". We suggest to add the following paragraph in the new section "Invisibility without cloaking":
In 2020, a new physical phenomenon related to the electronic resonance of laser processed materials was discovered. Using the new phenomenon, researchers from Laval University, Canada, have fabricated invisible photonic circuits. They discovered that the structure of a material can be modified to be usable for frequencies operating photonic devices and sensors, for example, while the structural modification becomes invisible for frequencies detectable by the eye. More precisely, they found that the positive refractive index (RI) change induced by the electronic resonance variation can exactly compensate the negative RI change induced by a structural expansion (both caused by the laser-induced modification), resulting in a zero RI change for certain colors, enabling invisibility.https://phys.org/news/2020-05-invisibility-concept-miniaturization-photonic-circuits.html
Jllheureux (talk) 15:27, 10 October 2020 (UTC)
thread_title:  Invisibility without cloaking 

message: This page is one subject to baseless edits and possible vandalism. Some old revisions often added sourceless misinformation to the top section, sometimes even removing the top section entirely, such as this edit, this one, or even this one. I think that this may need to be addressed at some point in the future. Not only this, but since this information seems to be consistent, it may either be a single lone sock puppeteer or it may be multiple editors getting information from a single, unreliable source and failing to cite it. 99.15.82.90 (talk) 03:35, 28 January 2020 (UTC)
thread_title:  About misinformation occasionally added to page 

message: The picture of the empty rocking chair is cute, but does it really add anything? On the other hand, I doubt we can find a better image of invisibility (an oxymoron!) so maybe it should stay... —Keenan Pepper 06:26, 17 January 2006 (UTC)
replies: text: *The image is funny, but ridiculous. Perhaps we could get a fair use image of one of the many films/tv shows where theyve shown someone "invisible". the old gag of the hat and glasses without the face would be good. Also see the german article where they have many images and are looking more at the scientific aspects of it -- Astrokey44|talk 09:34, 15 April 2006 (UTC)
replies: text: The new image is still in German. I suggest removing it until it is translated. —Keenan Pepper 17:14, 15 April 2006 (UTC)
replies: text: Remove it please. It's ridiculous and shammy. --Mkeroppi 17:32, 15 April 2006 (UTC)
replies: text: Hey, three people above said they liked the invisible girl. :Image:UNSIBA-5 Unsichtbarkeit mit Spiegeln.jpg isn't exactly serious either (what the heck are those little creatures?), and it has the added drawback of not being in the right language. —Keenan Pepper 17:48, 15 April 2006 (UTC)
replies: text: At least that showed the mechanism in question. It should be removed once it's translated. The "invisible" girl does not contribute to the context of the article, or at least some blurb/explanation has to be written to expand the definition. Right now, it's confusing. I'd agree to using films/tv caps, but not something "made up" made up. --Mkeroppi 17:14, 19 April 2006 (UTC)
replies: text: i find the image of the invisible girl very offensive as she's not wearing any clothes.  —Preceding unsigned comment added by 201.152.64.195 (talk) 00:53, 23 May 2008 (UTC)

text: It should be removed once it's translated. I don't follow you. The invisible girl is already removed. Why translate the diagram only to remove it? —Keenan Pepper 17:41, 19 April 2006 (UTC)
thread_title:  Hi 

message: I added this section. It overlaps with invisibility in fiction, but it's different because invisible fern seeds, for example, were not intentionally fictitious. This section is about how invisibility is used to help explain a supposedly true thing rather than to describe an intentionally fictitious thing. Jonathan Tweet 16:24, 17 July 2006 (UTC)
thread_title:  invisibility of nonexistent things 

message: "According to the laws of physics as presently understood, an invisible person would necessarily be blind, no matter how their invisibility were achieved. In order to see light, it must be absorbed by the retina, but in order for a person to be invisible, the body must not absorb light. In fact, according to the no cloning theorem of quantum mechanics, they could not even make a copy of the photons so they could see one copy and allow the other copy to pass through or around them."
But of course you can make a copy of the photons if you don't care about their quantum state. You'll achieve a great deal of invisibility if you just clone them any old way because the human eye is not all that polarization sensitive. Of course the no cloning theorem says that the person can be detected by some polarization tricks then, but without of those devices... — Preceding unsigned comment added by Dheerav2 (talk • contribs) 13:40, 13 December 2006 (UTC)
thread_title:  no cloning theorem ?? 

message: "On the other hand, a practical invisibility method need not allow light of all frequencies to pass all the time, so there may be ways around this limitation."
If we did allow, say, ultraviolet light through, could we have a computer interpret the colors it sees in ultraviolet, into the colors seen in visible light? Could ultraviolet light pass through the invisibility cloak designed by Imperial College London? The website for the invisibility cloak is... http://www3.imperial.ac.uk/newsandeventspggrp/imperialcollege/newssummary/news_20-10-2006-8-24-5?newsid=2812 09:31, 13 December 2006 (UTC)
thread_title:  Question about sight while invisible 

message: How do people feel about adding something to do with fictional pseudo-invisibility effects such as the Somebody Else's Problem field and the idea that Terry Prachett's Death cannot be seen by most people since they don't want to. Cmdr Adeon 19:06, 5 February 2007 (UTC)
thread_title:  Pseudo-Invisibilty 

message: Is there any way to become invisible?
: Not yet, although there are new technologies that are approaching it.  For example:
* http://www.dukenews.duke.edu/2006/10/cloakdemo.html - Scientists make an "invisibility cloak" that affects radio waves
* http://theblogjoint.com/2006/07/03/invisibility-cloaks-video/ and http://news.bbc.co.uk/2/2777111.stm - Japanese scientists create a form of Optical Camoflogue.
: So we're not at true invisibility yet, but these are inventions that are showing it might be at least possible eventually.  In addition, some of these inventions have interesting real life applications -- for example, making an invisible "window" inside a cement wall, allowing people to look outside without compromising security or (in the case of something like a CA Room) environmental settings, or creating an "invisibility cloak" that reflects radiation.  KiTA (talk) 17:34, 3 April 2008 (UTC)
thread_title:  Any Way? 

message: Yes, a cloak, but it is now 3-D unlike before, just 2-D. So, I added this as sub-section instead of just a paragraph. It is the very first discovery.--Florentino floro (talk) 09:46, 11 August 2008 (UTC)
thread_title: Magic in physics

message: I have heard from a friend of mine who read a physics article on invisibility that a material (I guess it would be more of a metamaterial) exists that greatly slows light, so you would see it, but not where it really is. I haven't had the chance to read the article, and even tough I hope to find it soon, I guess if anyone knew more about this, would be interesting to mention it here, altough it might not be considered to be actual invisibility since you would see the object eventually (depending on the degree of "lag" the slowing of light would cause, which I ignore). Also, I guess when the object became illuminated, it would take a while for it to appear, since light reflecting from it would take longer to reach the eye than the rest of the light reflecting from other objects. So, if anyone has true knowledge of this, it would be nice to see it posted on wikipedia.  Uberflaven (talk) 15:45, 3 April 2009 (UTC)
thread_title: Light-slowing material?

message: should the article do that?  — Preceding unsigned comment added by 173.75.210.110 (talk) 06:06, 1 June 2015 (UTC)
thread_title:  Link to Philadelphia Experiment? 

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thread_title:  External links modified 

message: Research Dr. Martha Gurban. Her work with creating the invisibility phenomenon was amazing. Urqueenrae (talk) 10:23, 28 December 2020 (UTC)
thread_title:  The Invisibility Phenomenon 

message: Bkzndb 2405:205:C92F:C81B:0:0:395:E8B0 (talk) 13:31, 22 December 2021 (UTC)
thread_title:  Dld 

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