Halo Cold Chamber
Rotate a 3D hexagonal ice crystal, catch refracted rays, resolve the spectral minimum, and build an honest atmospheric halo ensemble.
More optics creations
Pinhole Canopy
Shape a living leaf-gap projector and press four truthful images of the Sun into an outdoor field notebook.
Elin450
Pinhole Canopy
Explore optical physics, leaf-gap diffraction, and solar projection with the interactive Pinhole Canopy field notebook and simulator.
HELIOGRAPH — Signals Across the Iron Valleys
The line went dead at Cold Hollow and you are the new signal-keeper. Turn brass mirrors to walk a beam of sunlight across a hand-drawn valley and into the receiving station — then learn to split white light through a prism into three colours for three valleys, to husband a beam through fog that drains it, and to arrive on the beat while army shutters open and close. Twenty-four stations across five chapters, every one machine-proved solvable, with an honest par and a quiet score of plucked strings and glass bells.
Elin55196
Fringe Accumulator
Accumulate individual detections into three matched, source-backed Fraunhofer slit patterns inside a bright Three.js instrument gallery.
Elin90
Snell Plumb Facet Lantern
Seat two declared index plaques, tilt one local facet, and tension exact ideal Snell-law ray threads through four slope controls.
Elin60
Rayleigh Dye Vat
Sort three wavelengths through a fourth-power molecular dye line and distinguish illustrative direct transmission from a complete atmosphere.
Elin50