Homework Help: physics

Posted by Damon on Friday, August 10, 2007 at 1:01pm.

In the experiment of Lloyd's Mirror, I understand what happens when a light beam is shone on a mirror and reflected, and it is phase shifted by 180 degrees. But what I don't understand is what a phase shift actually is. Can someone explain?

The electric field component of the light is reversed in direction.

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