--- Iljitsch van Beijnum <iljitsch@muada.com> wrote:
The principle has been analogized to describe larger systems and items, and is a useful but not always completely accurate metaphor. It is entirely possible to observe some things without affecting them.
Is it? If I want to look at you, I must bounce photons off of you. Similar stuff needs to happen for other types of observation. This may not have a very large effect on you, but there is _some_ effect.
for some value of _some_, right? ;) I agree that there is an affect, but not necessarily due to the observation itself: consider a webcam. Whether I am observing you in the camera is not dependent on my interacting with you per se: the photons were already on their way from you to the lens. You could argue that those photons cause a change, but I would respond that the photons would have caused that change regardless of whether they are measured. Perhaps some beer and philosophy at the October meeting? ===== David Barak -fully RFC 1925 compliant- __________________________________ Do you Yahoo!? Yahoo! Mail - 50x more storage than other providers! http://promotions.yahoo.com/new_mail