Light as particles Day 9.

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Presentation transcript:

Light as particles Day 9

Light acting as a particle When you shine light on a substance, say sodium, you can excite the electrons As we saw with the ionization energy of hydrogen, energy can cause electrons to leave the atom How much energy does it need? How does that energy need to be applied?

Experimental Setup Why is there a battery in the circuit? What could you measure with this battery? cas.muohio.edu

Photoelectric effect observations http://phet.colorado.edu/en/simulation/photoelectric

http://hyperphysics.phy-astr.gsu.edu/hbase/mod1.html

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