An awesome video on the double slit experiment

[Forestman]

 

[Dmitry67]

This video is quite old
Also there is a place where it is misleading - where it says that 'just by observing the slits...' giving an impression that something magical happens.

 

[Forestman]

It might be old, never the less it is no less accurate.

Something magical does happen, nobody understand the collapse of the wave function. Quantum physics itself is like magic.

 

[Dmitry67]

1. There is no magic, when something is observed there is an interaction. In the video they show just an eye without showing how light (which is needed to 'see' an electron) affects the electron

2. Surprise! Since the discovery of Quantum Decoherence, which explained the measurement (to some extent) nobody believes any longer in the 'mysterious wavefunction collapse'. Copenhagen Interpretation is dead.

 

[Forestman]

I agree, never the less it is still no less magical. Instead of consciousness causing the wave function to collapse one finds instead an infinite number of universes all superimposed over each other and out of phase. And if you don't believe in the many worlds theory decoharance still does not explain why the wave function makes an electron appear on the right instead of the left when its wave function goes though decoharance. Quantum physics and Harry Potter have a lot in common.

 

[Dmitry67]

Decoherence does not imply MWI, you still have a choice between MWI, dBB (Bohmian mechanics) and SM (Stochastics mechanics). Decoherence is compatible with all these interpretations.

 

[Forestman]

I never said that decoherence only worked with the many worlds theory. I do hope that the many worlds theory is right though. I love it.

Look...Lets not argue anymore on this matter. I like to debate, but I am not trying to make you mad. Its just a video. No reason to get in huff. Its no big deal.

 

[StevieTNZ]

Decoherence doesn't actually collapse any wave function, so no actuality occurs.