Curiously, what can be considered an "observer" as far as a photon is concerned? Would a layman, who cannot interpret the meaning of the data still collapse the interference pattern? Or what if the only thing able to view the data of the photon's position is electron is a cat, will the interference pattern still collapse? Does the observer need to be a conscious person? Even though the cat can see the data, it cannot understand, or tell anyone what it saw. What exactly constitutes "knowing"?

Album name plz?

I really want this song.. /cry

Where did you get the song?