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If i shine a light at a particle it may heat up and that change due to interaction with the measuring medium is commonly regered to as 'knowing youre being measured'.

Ok, I get that, but I guess I don't see how "it's nature" then interacts with the computer.

Why are we stopping the photon in the first place because it will JUST pass thru and not interact?

Ok, I get that, but I guess I don't see how "it's nature" then interacts with the computer. Why are we stopping the photon in the first place because it will JUST pass thru and not interact?

But it will interact, all particles will interact when they hit something or even are close enough for field effects. And by allowing a whole particle to enter it will only add to the inaccuracy of the answer produced cause it keeps on throwing quantum 'signatures' around. If you prevent it from entering the measurement area but let it get close enough to allow an occasional 'imprint' through into the optics it will be far more precise. It's like how photos are sharp when the film is only exposed for a moment but fuzzy when they keep the film exposed (when photographing something moving.