The double slit experiment

This is not going to be on the test.  However, there was a question about it and this video is pretty good.

Also, there was a question about photons.  Basically, there are two models for light: light as a wave and light as a particle.  The particle model for light really isn’t needed.  Almost all of the effects we see with light can be explained using the wave model of light and a quantum model for matter.  I don’t think I should go into any more details – it gets a bit complicated.

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