how do you become invisable

Question: how do you become invisable
- Keywords:
  invisible
Asked by aishasabir to Sarah, Tom on 24 Jun 2011. This question was also asked by winter.
- Sarah Thomas answered on 24 Jun 2011:
  
  Here is a link to a real news article about a cloaking device that scientists are developing:
  
  http://www.telegraph.co.uk/science/science-news/8296338/Invisibility-cloak-enters-the-real-world.html
  
  This works by using materials that are made of tiny structures smaller than the wavelength of light. If properly constructed, such a cloak would actually guide rays of visible light around an object — much like a rock diverting water in a stream.
  
  Or you can use optics. Optical camouflage works on the same principles of the blue screen used by TV weather forecasters and Hollywood filmmakers. If you want people to see through you, then why not just film what’s behind you and project it onto your body?

Question: how do you become invisable