Tuesday Mar. 4, 2008
Expt. #3 coming on Thursday.
The electric field arrow
at any point in the pattern
shows the direction and strength
of the electrical force
that would be exerted
on a positive charge placed at that point
Many textbooks draw a wavy line and tell you this is
electromagnetic
radiation without really explaining what the wavy line represents.
The wavy line just connects the tips of a bunch of electric field
arrows.
A charge will bob up and down as EM radiation streams by
just like a swimmer does in the ocean as waves pass by
