posted on Sep, 9 2007 @ 11:27 AM
CRTs usually operate from 60-85Hz. Meaning the image is being writte 60-85times per second. The framerate of the camera is usually half that, so you
catch images between writes.
If your refresh rate is set low enough you can, at least I can, look off to the side of the monitor (only on CRTs), and you can see the refreshing.
As for the feedback effect... something similar and cool, depending on your mindset, is to look at your eye in the mirror. You can see a reflection
of yourself, in yourself. Get close enough and you can see a reflection of yourself, in yourself, in yourself.