Light, refraction, polarization, and optical phenomena
20 Oct 2026
Mirror formula calculator for concave and convex mirrors — find image distance, magnification, and image type from an interactive ray diagram tool.
Lens formula calculator with five worked examples and the full sign convention — plus a film-plane bench for chromatic aberration and achromatic doublets.
13 Oct 2026
Snell's law calculator and interactive refraction simulator — find the angle of refraction and critical angle, and see total internal reflection live.
26 Aug 2026
Myopia and hypermetropia calculator — see whether an image forms in front of or behind the retina, then find the exact corrective lens power in diopters.
14 Jun 2026
See how light waves interfere and diffract with four interactive simulations — Young's double slit, single-slit diffraction, and diffraction gratings explained.
20 Apr 2026
What is a mirage and are mirages real? How inferior mirages, superior mirages and Fata Morgana form — explore all types with 3 interactive simulations.
12 Jan 2018
How do 3D glasses work? Polarized, red-cyan anaglyph and active shutter glasses explained with interactive polarization and depth simulations.