42° Light
42°
Lived
Authored game of the primary rainbow angle

PhotoConall from Downpatrick, Northern IrelandCC BY 2.0
Play built on a measured 42°. The measurement is the rainbow object; this is the game.
What it supports
A door from play to the optical geometry.
What it does not
Not a replacement for Descartes. The measurement is the rainbow object.
ExactnessAuthored use
Form42°
Unitgame
Strengthmemoir