Don't smoke, though.
Another mathematical oddity in the natural world.
This was a cancelled "Work-At-Home" experiment for physics undergraduates, due to local weather conditions, and a second thought that this project is better suited for high school students. Conic Sections You may skip to the next section if you are comfortable with analytic geometry or related mathematical fields. If you use a plane to cut … Continue reading [Little Demos] 04 – What Curve Do Shadows Trace (On a Spherical Earth)?
The sky is an infinite void, but also a dome.
Qualitatively representing space-time optics with actual optics.
One of my oldest physics party tricks, now photographed in makeshift home studio.