Notices
Results 1 to 11 of 11

Thread: INVISIBILTY

  1. #1 INVISIBILTY 
    Forum Freshman
    Join Date
    Aug 2008
    Location
    england
    Posts
    8
    IN THE NEWS I HAVE HEARD THAT SCIENTISTS HAVE FOUND A MATERIAL THAT BENDS LIGHT OR SOMETHING SO THINGS BEHIND IT COULD BE INVISIBLE BUT THEY JUST PRODUCED SOMETHING THAT IS IN THE NANO SCALE.

    COULD someone be kind to explain that to me?


    Reply With Quote  
     

  2.  

    Related Discussions:

     

  3. #2  
    Forum Ph.D. Cat1981(England)'s Avatar
    Join Date
    Sep 2006
    Location
    South Downs.
    Posts
    913
    Place a pencil in a glass of water and it will appear slightly bent. From what i have read, a microscopic arrangement of silver wires can be produced to bend light around an object, so if you were looking at someone you with this material on you would see behind them. Although this work is still in the very early stages, and at a very small scale, there is no reason why we should not have invisibility cloaks at some point in the future. Which should be a lot of fun.


    Eat Dolphin, save the Tuna!!!!
    Reply With Quote  
     

  4. #3  
    Forum Freshman
    Join Date
    Sep 2008
    Posts
    8
    So that's how Harry Potter's Invisibility Cloak works!
    Sol Hatebad. Soulmate of Luna Lovegood.
    Reply With Quote  
     

  5. #4  
    Forum Ph.D.
    Join Date
    Jul 2008
    Location
    Everywhere
    Posts
    807
    Quote Originally Posted by Sol Hatebad
    So that's how Harry Potter's Invisibility Cloak works!
    Here's a story about invisibility that works,

    A renowned 'magician' (i won't mention his name) wanted to gain entry into a certain place without being seen (invisible) the guard on the gate was instructed not to let anyone enter.
    Later in the day it was noted that someone had obviously entered the premises and removed some important documents.
    An investigation took place and when questioned the guard insisted that nobody had entered the premises as he was watching at ALL times!
    'Absolutely nobody got past me and entered the premises' he swore, 'oh, apart from the postman' he added as an afterthought.
    Absum! has never been bored in her life, but is becoming increasingly bored of the Science Forum! :?


    (.·.¸❀¸.·´¯`·.¸☼¸.¤...-♥»゜・*.:。✿*゚‘゚・✿.。.:* *.:。·.¸❀¸.·´¯`·.¸☼¸.¤...-♥»゜・*.:。✿*゚‘゚・✿.。.:* *.:。·.¸❀¸.·´¯`·.
    Reply With Quote  
     

  6. #5  
    Forum Freshman MoonWolf's Avatar
    Join Date
    Jul 2008
    Posts
    66
    That's so right, Absum!.
    Thieves and robbers always make an effort to dress down and appear less than ordinary so that nobody notices them, and it's true, we only really notice people that stand out in some way or capture our interest.
    Reply With Quote  
     

  7. #6  
    Forum Ph.D.
    Join Date
    Jul 2008
    Location
    Everywhere
    Posts
    807
    Quote Originally Posted by MoonWolf
    That's so right, Absum!.
    Thieves and robbers always make an effort to dress down and appear less than ordinary so that nobody notices them, and it's true, we only really notice people that stand out in some way or capture our interest.
    A young friend of mine who considers herself an 'introvert' dresses in emo gothy with pink hair and many unusual piercings complains she hates it when people stare at her all the time!

    She is young so....one day she will learn there are advantages to not looking 'different'!
    Absum! has never been bored in her life, but is becoming increasingly bored of the Science Forum! :?


    (.·.¸❀¸.·´¯`·.¸☼¸.¤...-♥»゜・*.:。✿*゚‘゚・✿.。.:* *.:。·.¸❀¸.·´¯`·.¸☼¸.¤...-♥»゜・*.:。✿*゚‘゚・✿.。.:* *.:。·.¸❀¸.·´¯`·.
    Reply With Quote  
     

  8. #7  
    Forum Freshman
    Join Date
    Sep 2008
    Posts
    8
    At least any scientifiic or pseudoscientific theory of invisibility would not be as implausible as a theory of "X-ray vision", the ability to see through opaque objects, as possessed by Superman, and by Alastor Moody in the Harry Potter books.

    To see something is to perceive it using the sense of sight. But you can only perceive something if there is a stimulus travelling from it to your sense organ. Suppose an object is kept in a box with opaque sides and corners. In order to see it from outside, light must come the object to your eyes. It might be reflected light, or light given off by the object itself if it's luminous. But if the box is opaque, no light of any kind can come out of it from the object. Hence there is no way you can see the object in the box, no matter how powerful your eyes may be. :|

    Therefore invisibility is okay, but X-ray vision is a total fake in science fiction! :x
    Sol Hatebad. Soulmate of Luna Lovegood.
    Reply With Quote  
     

  9. #8  
    Forum Ph.D.
    Join Date
    Apr 2008
    Posts
    956
    What you need is radar vision, not X-ray vision. Ideally, you want to be able to emit signals that will pass through the box but reflect off the object inside. You “perceive” the object in the box by detecting and interpreting the signals reflected off the object back to you. 8)
    Reply With Quote  
     

  10. #9  
    Forum Ph.D.
    Join Date
    Jul 2008
    Location
    Everywhere
    Posts
    807
    Who said that?

    Though i just heard a little squeak
    Reply With Quote  
     

  11. #10  
    Forum Freshman
    Join Date
    Sep 2008
    Posts
    8
    Quote Originally Posted by JaneBennet
    What you need is radar vision, not X-ray vision. Ideally, you want to be able to emit signals that will pass through the box but reflect off the object inside. You “perceive” the object in the box by detecting and interpreting the signals reflected off the object back to you. 8)
    That's an excellent theory! :-D

    Yes. There is no pereption without stimuli; there's no way you can perceive what is not emitting anything for any of your sense organs to pick up; hence there is no such thing as X-ray vision. However radar vision as you proposed looks the best scientific explanation of how Superman and Mad Eye Moody can "see" through opaque objects! It's actually a much better theory than invisibility.
    Sol Hatebad. Soulmate of Luna Lovegood.
    Reply With Quote  
     

  12. #11  
    Suspended
    Join Date
    Dec 2008
    Location
    Calgary, Alberta
    Posts
    599
    If I recall, there was some military curios that came out that used hundreds of small cameras and properly angled screens on a tank to make it become virtually invisible when it was at a standstill.

    Not as cool as pulling on a cloak, but harry potter is a bit of a knob anyways.
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •