Optical Illusions and Parabolic Ghosts

March 30, 2019

 

[S2 Maths Topic: Graphs & Quadratic Equations] Optical illusions. They are a rare occurrence in Nature, and sometimes observed over deserts in the form of mirages, or the Brocken spectre when the sun casts your own shadow among moving clouds to name a few.

 

But with the help of Physics (and Maths), we can recreate a "mirage" [Parabolic Ghost] of an object by placing it carefully between two special, non-Euclidean convex mirrors.

 

A Do-It-Yourself mirage? How does it work? Professor Burkard Polster works out the mathematics behind the phenomenon so that you can try to make one yourself.

 

(Hint: Some old flashlight heads have the perfect geometry to replicate the [y = x^2] shape depicted in the video. Look around your house for one!) 

 

The Secrets of Parabolic Ghosts

Please reload

Featured Posts

I'm busy working on my blog posts. Watch this space!

Please reload

Recent Posts

November 5, 2019

October 29, 2019

October 22, 2019

September 10, 2019

August 27, 2019

August 5, 2019

Please reload

Archive