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ryadav
Guest
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 Posted:
Thu Nov 03, 2005 5:35 pm Post subject:
how to make objects invisible. |
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I don't know is this is valid question or not. Is it possible to make
objects invisible in sun light. Anybody have comments on this?
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Impmon
Guest
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| Posted:
Thu Nov 03, 2005 5:35 pm Post subject:
Re: how to make objects invisible. |
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On 3 Nov 2005 07:56:07 -0800, "ryadav" <raghuyadav77@gmail.com> wrote:
| Quote: | I don't know is this is valid question or not. Is it possible to make
objects invisible in sun light. Anybody have comments on this?
|
like cloaking device? Technologically we don't have that capability
yet. Just recently some Japanese were able to invent some form of
clothings that bends light around to give an illusion of
semi-transparent person. But no true invisibility yet.
--
When you hear the toilet flush, and hear the words "uh oh", it's already
too late. - by anonymous Mother in Austin, TX
To reply, replace digi.mon with phreaker.net |
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Buddy Smith
Guest
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| Posted:
Thu Nov 03, 2005 5:41 pm Post subject:
Re: how to make objects invisible. |
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ryadav <raghuyadav77@gmail.com> wrote:
| Quote: | I don't know is this is valid question or not. Is it possible to make
objects invisible in sun light. Anybody have comments on this?
|
I seem to remember a chemistry teacher in high school filling a
glass container with glycerine. Then he put another smaller glass
container inside, and it was invisible. I believe it had something to do
with the index of refraction :)
It was neat though. Did I remember this experiment correctly?
--buddy
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Don Taylor
Guest
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| Posted:
Fri Nov 04, 2005 1:20 am Post subject:
Re: how to make objects invisible. |
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"ryadav" <raghuyadav77@gmail.com> writes:
| Quote: | I don't know is this is valid question or not. Is it possible to make
objects invisible in sun light. Anybody have comments on this?
|
http://www.coasttocoastam.com/guests/83.html
(but do be a bit cautious with coasttocoastam.com's guests, some can
seem perfectly normal for a while... and then suddenly spiral off into
being full blown fruit loops)
You can also google for
military camouflage fractal invisible
I seem to recall reading something about using fractals to approximate
invisiblity |
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JeffM
Guest
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| Posted:
Fri Nov 04, 2005 1:35 am Post subject:
Re: how to make objects invisible. |
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| Quote: | Is it possible to make objects invisible in sun light.
ryadav
|
The PBY (Patrol Bomber, Catalina),
(used for hunting and killing submarines during WWII)
had lights mounted on the leading edge of their wings.
During daylight hours,
they could get so close to subs without being noticed
that the U-boats didn't have a change to dive and escape. |
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CWatters
Guest
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| Posted:
Fri Nov 04, 2005 1:35 am Post subject:
Re: how to make objects invisible. |
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"ryadav" <raghuyadav77@gmail.com> wrote in message
news:1131033367.461335.229930@g14g2000cwa.googlegroups.com...
| Quote: | I don't know is this is valid question or not. Is it possible to make
objects invisible in sun light. Anybody have comments on this?
|
Well... I don't know if these are valid answers but...
This microdot ---> <----- is so small you can't see it.
The planet venus passed in front of the sun a year or two ago. Nobody could
see an entire planet with the naked eye - but you could see it using a
shaving mirror and a sheet of paper.
If you stand in a room full of people, take all your clothes off and try to
dance with someone.... suddenly nobody will be able to see you...except men
wearing white coats. |
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Rich Webb
Guest
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| Posted:
Fri Nov 04, 2005 1:35 am Post subject:
Re: how to make objects invisible. |
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On Thu, 03 Nov 2005 12:14:08 -0500, Impmon <impmon@digi.mon> wrote:
| Quote: | On 3 Nov 2005 07:56:07 -0800, "ryadav" <raghuyadav77@gmail.com> wrote:
I don't know is this is valid question or not. Is it possible to make
objects invisible in sun light. Anybody have comments on this?
like cloaking device? Technologically we don't have that capability
yet. Just recently some Japanese were able to invent some form of
clothings that bends light around to give an illusion of
semi-transparent person. But no true invisibility yet.
|
IIRC, what they really did was to dress the cloakee in retro-reflective
clothing and project an image of the entire scene onto him. An old
trick, really.
http://projects.star.t.u-tokyo.ac.jp/projects/MEDIA/xv/oc.html
--
Rich Webb Norfolk, VA |
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Mark Haase
Guest
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| Posted:
Fri Nov 04, 2005 7:45 am Post subject:
Re: how to make objects invisible. |
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In article <q8hkm194v3ckoin9n31nifn14c09nob032@4ax.com>,
Impmon <impmon@digi.mon> wrote:
| Quote: | On 3 Nov 2005 07:56:07 -0800, "ryadav" <raghuyadav77@gmail.com> wrote:
I don't know is this is valid question or not. Is it possible to make
objects invisible in sun light. Anybody have comments on this?
like cloaking device? Technologically we don't have that capability
yet. Just recently some Japanese were able to invent some form of
clothings that bends light around to give an illusion of
semi-transparent person. But no true invisibility yet.
|
Hmm..dunno if you're referring to the same thing, but I've seen one
where they cover "invisible" surface with a matte, reflective material.
There is a camera just on the other side of the object filming its
background and a projector in the foreground superimposing that image on
top of the scene. The net effect is that the object is very hard to see
from a particular angle. There are some videos online which demonstrate
some funny visual effects.
--
|\/| /| |2 |<
mehaase(at)gmail(dot)com |
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Don Stauffer
Guest
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| Posted:
Fri Nov 04, 2005 5:35 pm Post subject:
Re: how to make objects invisible. |
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ryadav wrote:
| Quote: | I don't know is this is valid question or not. Is it possible to make
objects invisible in sun light. Anybody have comments on this?
We can REDUCE visibility but not make most things (solids- liquids) |
truly invisible. Just like stealth technology. These do not make
aircraft truly 'invisible' to radar, only greatly reduce their detection
range.
One problem is that even a transparent material (such as glass) which
has an index of refraction greater than air (virtually all solids have
an index considerably greater) still creates some reflections at the
air/solid interface. So even if an object is truly transparent, you
will see some reflection and background refraction, especially in strong
sunlight.
Truly strong absorbers as used in radar do NOT work, as the result is
you see a flat black object standing out against a visible background. |
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Al
Guest
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| Posted:
Fri Nov 04, 2005 5:35 pm Post subject:
Re: how to make objects invisible. |
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In article <1131056637.478269.14830@g43g2000cwa.googlegroups.com>,
"JeffM" <jeffm_@email.com> wrote:
| Quote: | Is it possible to make objects invisible in sun light.
ryadav
The PBY (Patrol Bomber, Catalina),
(used for hunting and killing submarines during WWII)
had lights mounted on the leading edge of their wings.
During daylight hours,
they could get so close to subs without being noticed
that the U-boats didn't have a change to dive and escape.
|
Also, ships were painted with bizarre patterns. When seen at a distance
on the ocean, the human eye/brain combo rejects the pattern as not what
is expected. This renders the ship "invisible."
http://www.shipcamouflage.com/
Al |
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bhauth
Guest
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| Posted:
Sat Nov 05, 2005 9:35 am Post subject:
Re: how to make objects invisible. |
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hard way: if you have a little exotic matter and control of matter at
the planck scale, stick your object in a spacetime bubble.
easy way: remove object. |
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Art
Guest
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| Posted:
Sat Nov 05, 2005 5:35 pm Post subject:
Re: how to make objects invisible. |
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Just leave the flippin things where my grand kids can get their hands on
them. Then the odd of reproducing them is >99%. They have a way of
relocating or making then invisible instantly.
"bhauth" <bhauth@gmail.com> wrote in message
news:1131179359.467634.162470@z14g2000cwz.googlegroups.com...
| Quote: | hard way: if you have a little exotic matter and control of matter at
the planck scale, stick your object in a spacetime bubble.
easy way: remove object.
|
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me
Guest
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| Posted:
Sun Nov 06, 2005 9:35 am Post subject:
Re: how to make objects invisible. |
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Don Taylor <dont@agora.rdrop.com> wrote in news:W8OdnWuy_49v__feRVn-
rw@scnresearch.com:
| Quote: | "ryadav" <raghuyadav77@gmail.com> writes:
I don't know is this is valid question or not. Is it possible to make
objects invisible in sun light. Anybody have comments on this?
put it in the closet...? |
----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
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The Alien
Guest
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| Posted:
Sun Nov 06, 2005 5:35 pm Post subject:
Re: how to make objects invisible. |
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Yes! I do it all the time! Believe it or not, use lights!
On 3 Nov 2005 07:56:07 -0800, "ryadav" <raghuyadav77@gmail.com>
scratched with their pencil:
| Quote: | I don't know is this is valid question or not. Is it possible to make
objects invisible in sun light. Anybody have comments on this?
|
------------------------------------------------
Autobot This Spammers!
<A HREF="mailto:postmaster@[127.0.0.1]"></A>
mailto:postmaster@127.0.0.1
(to reply to actual address, dispense the dots before
and after sirname. |
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Guest
|
| Posted:
Mon Nov 07, 2005 5:35 pm Post subject:
Re: how to make objects invisible. |
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Adam Hart-Davis on the BBC, once mounted a lot of those LED-based
outdoor display screens, on one side of a car. On the other side, a
camera, and the effect, as seen on television, was actually pretty
impressive.
If you hadn't been looking for it, it *might* have fooled you.
So the answer is, yes, in very limited conditions. Similarly magicians
make things "disappear" from certain angles.
But for practical purposes, no, not yet. Perhaps OLED clothing will
one day do the trick.
------------------------------------------------------------------------
if love is a drug, then, ideally, it's a healing, healthful drug... it's
kind of like prozac is supposed to work (without the sexual side
effects and long-term damage to the brain and psyche) |
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