Who can explain what’s happening in this experiment?

Who can explain what’s happening in this experiment?  

Hint: it comes from a  Derek Muller video. Check out the Veritasium Channel here: http://goo.gl/pwNlT.  We’ll post an answer in if no one gets it in the next couple hours. 

Meet Derek and ask him questions live during the next Science on Google+ Conversation coming on Wed, Aug 7th at 5 PT during YouTube Geek Week

RSVP: http://goo.gl/AbLhsb

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  1. they are demonstrating the refraction pattern characteristic of waves interfering with each other. it is sometimes called the two-slit experiment.  particles don’t create this pattern, only waves.  it was the experiment that proved that light has a wave characteristic.  prior to this, it was believed that light (photons) were particles.


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