> The particles pile up behind the slits not in two heaps as classical objects would, but in a stripy pattern like you'd expect for waves interfering. At least this is what happens until you sneak a look at which slit a particle goes through - do that and the interference pattern vanishes.

Could any of the physicists here verify whether it is the case that detecting the slit the particle passes through destroys the interference pattern. I had the impression that the path of the photons could be determined without destroying the pattern.