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echo: physics
to: All
from: Grant Weasner
date: 2017-02-23 16:53:32
subject: basic waves electromagnetic question

There is a diagram online and in books all over. The diagram show direction
and magnetic wave oscillating perpendicular along the wave. 

Does that magnetic field change polarity between min and max of the light
wave amplitude? 

In this diagram it shows the magnetic field shift sides along the wave. 

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