#403Prism Spectrum Splitter

A collimated white beam enters a triangular prism and fans into a rainbow — each wavelength refracts by a Cauchy-dispersion angle (violet bends most, red least), so the spread is physically ordered rather than a painted gradient. The pixel is inverted through n(λ) = B + K/λ² to recover which colour lands where. Move the pointer to reposition the source; scroll to rotate the prism.