Tom, Take a look at http://www.newton.dep.anl.gov/askasci/gen01/gen01404.htm. Be sure to read both answers. The first answers indicates that the illusion won't happen under steady lighting. The second answer indicates how the illusion could happen under that condition. Hope it helps Dennis
-----Original Message----- From: Tom Allaway [mailto:[EMAIL PROTECTED] Sent: Thursday, April 01, 2004 9:40 AM To: Teaching in the Psychological Sciences Subject: A Perception Question In a class discussion of the phi phenomenon the other day, the talk drifted around to stroboscopic phenomena, and the "wagon-wheels-turning-backward" illusion that you get with films or TV. I explained this briefly, but several of my students said that it didn't depend on a flashing or intermittent source of illumination, as they frequently saw this effect in broad daylight, on the wheels of moving cars (especially those with wire wheels). I told them I didn't understand how that could be. Can you get this illusion under continuous illumination? How? --- You are currently subscribed to tips as: [EMAIL PROTECTED] To unsubscribe send a blank email to [EMAIL PROTECTED] --- You are currently subscribed to tips as: [EMAIL PROTECTED] To unsubscribe send a blank email to [EMAIL PROTECTED]
