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# The laser is irrelevant
It's just a pointer - it actually measures the IR coming off the surface
(I helped save b3ta! The Boy T, Thu 19 Jan 2006, 22:45, archived)
# aha!
(I helped save b3ta! mediocre ha ha ha, you're reading this, Thu 19 Jan 2006, 22:46, archived)
# in co-op* we have one and you can't see the laser so it's not just there to aim with
i guessed it might be something to do with the particles in the thing you point it at moving/vibrating at different speeds therefore causing tiny amounts of doppler shift, but now thinking about it that's a load of bollocks

*it's okay i'm a student
(UltimateStoat thanks you for helping him help you help us all, Thu 19 Jan 2006, 23:18, archived)