Detection of 10^-21 m Particles - Ray Veldkamp

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Hi, does anyone know of something of length of order 10^-21 m? I need it for an assignment to describe the detection of something of that length

Regards
Ray Veldkamp
 
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Look : \hbar c = 200 MeV fm

so, 10^{-21} m naturally correspond to energies of order 200 TeV !

Dude, that's a lot ! No current accelerator is able to reach this energy.

Are you certain of the value you are quoting here ?
Could it be the teacher is trying to trick you ?
 
Yeh its definitely that small, its this stupid unit called methods of experimental physics, we all got assigned a power of 10 and told to describe the operation of a detector to measure a length of that magnitude...i fail to see any point in this but its got to be done
 
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