Category Archives: Ray Tracing

The statement below is false

If you think I’m wrong, try looking at it from a different perspective. The picture above came from an optical illusion blog at: and I was led there from: which is an amazing collection of mathematical imagery by … Continue reading

Posted in Bach, Maths, Newton, Ray Tracing | Tagged , , , , | Leave a comment

Leonardo, lenses and the earliest photograph?

Walking around Venice I had seen a large poster for a Leonardo Da Vinci exhibition, with no details of locations or dates, and on the Internet the only links were to exhibitions from previous years, but arriving in Florence I … Continue reading

Posted in Newton, Ray Tracing | Tagged , , | Leave a comment

Another link from Al Vachris: The link above has a general subject index, and google site search; for a full list of the site content go to the detailed site index. Here’s what the author says about it: “The … Continue reading

Posted in Computing - general, Coordinate Geometry, Maths, Newton, Ray Tracing | Tagged , , , | Leave a comment

Yet more pendulums

Following Dynamically Defined Dancing Pendulums, another three versions of the dancing pendulum theme.  First a POV-RAY version by PM 2Ring, complete with reflections and shadows: POV-Ray Pendulums (click to open in a new window) and an interactive Javascript version: Javascript pendulums by PM2Ring (click … Continue reading

Posted in Animation, Excel, Newton, Ray Tracing | Tagged , , , , | 1 Comment

Will it Fall Over?

Is the arch in the picture below stable, or has it been created in Photoshop, or perhaps with the assistance of some glue or external straps? A simple analysis suggests that tension will be generated at the bottom of the … Continue reading

Posted in Arch structures, Finite Element Analysis, Newton, Ray Tracing | Tagged , | 2 Comments