Vista - Never Asked This Before...

And noticed it when I was very little.

Why do you see after images when you wave your hand across a tv/computer monitor or display? I know it's not light, since I just tried it now with my lamp.

...holy crap, it doesn't do this on my lcd laptop display! Hmm...guess it's just CRT TV/computer displays maybe because of the scan lines, am I right?

Yes, it is the "scan lines", the refreshing of the screen acting like the strobe light in the dance floor.

Thanks. Cool Sasuke avatar.

Thanks, but it is his brother Itachi Uchiha. Cheers!

the crt television refreshes its screen 60 times a second. 60Hz input. So I presume a 50Hz television elsewhere refreshes at 50 times a second.

I remember an optical illusuion from years ago. Watching the US flag on a black and white telly for about 2 minutes. Look away to a dark wall in the same room, and the flag becomes one with colors. i never tried it, so I don't know how true it is.