Parallel Universes

You may have heard that it is something of the vogue currently, to believe in the existence of parallel universes. Apparently they are useful to science and one of the ways we 'know' about them is the strange behaviour of light. If you shine a light at a card with two slits in it the image on a card behind will be of something resembling a bar code, bands of light and dark. This is caused by the wave action of light at times reinforcing and at times interfering.

Trouble arose though when a single photon was fired at the card. Obviously it should pass through one slit with no chance of 'banding' occurring as there is nothing to cause interference. Except banding does occur. So what is causing the interference? According to the theory, it is photons from another universe. Or several universes. Even stranger though, is the fact that if you try to observe the photons directly the banding (and interference) disappears.

Here I have a problem as this doesn't seem likely. Are we supposing the photon has some consciousness? Do they know they are being watched? (I am aware that much in science is counter-intuitive, but never the less..). Being able to notice the interference tells us there are other photons, so hiding when we look isn't too bright (if you'll excuse the pun).

It strikes me that the photons causing the interference are not from another universe but another time. I suspect that the 'arrow of time' may be a bit of an illusion. Being from another time does allow for interference but also would answer the disappearance when observed too. You see, when you choose to spot a photon you do so from the perspective of out 'time'. So the other photons cannot physically exist in that situation, in that moment.

Obviously I have no idea, or ability to base this on anything. It just strikes me that the time version answers the questions and the universe one doesn't.