Fun optical chimaera

Drop in here to discuss whatever you want.

Moderator: andrew

Fun optical chimaera

Postby hungerburg » Tue Nov 26, 2013 12:53 pm

Recently, the Feynman Lectures on Physics became free to read on the web. In the chapter on the eye - http://feynmanlectures.caltech.edu/I_36.html#Ch36-F1 - there is mention of an illusion. I had to give it a try, and QCAD is my tool of choice for such drawings: Although they are not strictly CAD, it has the right tools to construct certain 2D vector grafics.

So, attached the drawing and below a foto of what the thing looks like - beware though, that the effect is only visible with the real stuff, the foto cannot capture it. First I tried with the electric drill, but that went much too fast. More mundane it works when built as a top. Speed is very essential, one has to wait a little in order to see; especially in a dim room and the disc below a light bulb the effect will show very good.

ColourTop.jpg
Foto of the completed thing as a spinning top
ColourTop.jpg (153.87 KiB) Viewed 873 times
Attachments
ColourTop.dwg
Blueprint for disk that shows mysterious colours when rotated.
(17.23 KiB) Downloaded 41 times
User avatar
hungerburg
Senior Member
 
Posts: 125
Joined: Fri May 28, 2010 7:35 pm

Re: Fun optical chimaera

Postby Clive » Thu Nov 28, 2013 2:18 pm

Cool 8) , I'm going to laser cut some of these....so, that's all my Christmas presents sorted out - just kidding :lol: :lol:
Clive
User avatar
Clive
Moderator
 
Posts: 956
Joined: Thu Aug 25, 2011 9:28 pm
Location: UK


Return to Chat

Who is online

Users browsing this forum: No registered users and 0 guests