Looking for a science term/word

Pawnless Endgame · 5 Oct 2011 at 21:30

Quick question :-)

If you look at an old CRT and place a fan between you and the screen, the fan blades appear slower than they really are. It depends on the screen's refresh rate and the speed of the fan. I tried Youtubing frame rates and suchlike. Anyone know the science word for this? I think there can be some related videos out there. For example, someone on Overclockers a few years back posted a video of a helicopter. The rotor blades had the same revs per second as the frame rate of the camera, which made the rotor appear static while flying. Cheers!

d_brennen · 5 Oct 2011 at 21:32

No idea but also curious!

Oh yeah, if I look through the 140mm fan on the front of case the 140 on the back looks like it's slowly spinning the wrong way

Flare · 5 Oct 2011 at 21:34

It's the same affect as when someone is dancing and there is a strobe light in the room

BlackDragon · 5 Oct 2011 at 21:36

This?

PermaBanned · 5 Oct 2011 at 21:36

Similar to the wagon-wheel or stroboscopic effect?

Pawnless Endgame · 5 Oct 2011 at 22:27

Ahhhhh that's it, thanks Perma'd and BlackDragon :-)