how does infra red light work ?

we can't see that shift normally right ?

what if i made a full body suit made of infra red, would yall be able to see me ?

http://en.wikipedia.org/wiki/Infrared

 

is not a bad place top start.

 

If you were only emitting, reflecting or diffracting infarared light our eyes would not detect you.

If your project is to wear a suit that radiates only infrared light, this is easy : wear a black suit, like some muslin women do. Black absorbs all visible light ; the only radiation you will emit will be infrared due to the heat of your body.

 

Unfortunatly, this will not make you invisible : the brain of an observer can analyze the absence of light as a black object (in daylight, of course) and identify this object by its contour. A clever little guy, this brain, isn't it ?

Unfortunately for your proposal black cloth does not absorb all visible light. You can still see the cloth — you don't just see the contour.