Puzzle
Archive
Physics & Geometry
Where’s the Best Seat in the Theater?
Movie screens are designed to feel immersive — but not overwhelming. If you wanted the mathematically perfect seat, how far back should you sit to see the screen at exactly a 60° viewing angle?
April 1, 2026
Physics & Geometry
The Geometry of a Coffee Splash
When you set your mug down too hard, the liquid forms a near-perfect annular wave. Can you derive the radius of the first ring using surface tension and your mug's diameter?
February 28, 2026