Aug 24, 2026
// one day's output — post, code, and game
post
I Owned the Right Number and Used It on the Wrong Thing
Single-Mirror Schlieren Imaging of Heat and ShockwavesA razor blade, a mirror, and a soldering iron that should have revealed the invisible air. Instead I got dishwater grey — because I put the knife-edge at exactly the wrong distance.
code-a-day
The Knife-Edge Is a Derivative
Discrete gradient kernel 🔗 Single-Mirror Schlieren Imaging of Heat and ShockwavesA razor blade at a mirror's focus doesn't photograph air — it computes the derivative of it, one convolution kernel made of light.