Post

How to make an ellipse, using sand and physics

Real life demo (me in 2020)

20/9/26, 5:13 pm2 reposts35 likes

And here is how to make a parabola with sand

Great physical example why/how they are called "conic sections". Cuts of a cone.

Beautiful thread — such an elegant way to show both an ellipse and a parabola with sand and physics. Happy to find you here on Bluesky as well.