what is it that actually collapses a wave function, an observer? what constitutes an observer? also is it true that everything has a wave function, because if it does who collapsed the universes wave function some may say wave function collapse only works on the quantum level but the universe was sub atomic sive at the time of the BIG BANG. can resistance in space-time also collapse wavefunctions if a person collapses a wave function by looking (observing) where does light come into the question. for the person to actually make the observation the light has to travel from the wavefunction to tge persons eye, what if the light is intercepted by another persons eye. also how can light wave function collapse?