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Originally posted by earth2
It wasnt shadows you seen it was the tv lighting going from darker to light depending on what you are watching. Seen it a million times, well maybe not a million.
Originally posted by Byrd
The apparent motion is caused by the pattern of light on your tv screen.
If you took a flat light source (say, a program that turned your monitor screen white and then cycled through the other colors), you would see that the shadows don't move as the light changes.
But on the tv, the patterns of color and dark are continually changing, so in effect your "point light source" is from a continuously changing direction.