How To See Through an Invisibility Cloak

AMESN writes "Ways to bend light around objects and render them invisible are becoming a major field of scientific study and gaining ground. While no actual invisibility cloak exists yet, researchers are also theorizing on how to beat the perfect cloak."

Comments

The easy solution, from the article

[JonC88]

Just throw a stone at it.

It's been proved impossible using negative ior

[Anonymous Coward]

Vadim Markel of UPenn has shown that negative index of refraction is inconsistant with the second law of thermodynamics:

http://www.opticsinfobase.org/abstract.cfm?URI=oe-16-23-19152

At least that approach makes cloaking impossible. I am not sure why people are being so slow to accept this. Probably since so much funding has gone into negative index of refraction. Note there is also an arxiv paper on this.

TFA

[wizardforce]

TFA mentions using charged particles and multiple wavelengths of EM to detect a clocked object. TFA suggests that they were measuring the actual effect on the path of the radiation its self although it should be pointed out that this is quite possibly unnecessary as high energy charged particle entering a solid material undergo an extremely high de-acceleration phase which causes charged particles to emit EM radiation. It's called Bremsstrahlung radiation and could quite possibly be detected.

ahem, Nethack!

[MRe_nl]

nt

Re:It's rather easy...

[AaxelB]

You can drink a blessed potion of see invisible or eat an invisible stalker's corpse while invisible.

Or just be a monk. You also get the bonus of being incredibly badass.

Silly question

[eyrieowl]

Use a scrying spell, obviously.

Spychecking

[VGPowerlord]

Well, the easiest way is to have Pyros that Spycheck, or just bump into the Spy by accident.

Wait, you don't mean in Team Fortress 2?