Light, refraction, polarization, and optical phenomena
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.
24 Aug 2026
Mirror formula calculator for concave and convex mirrors — find image distance, magnification, and image type from an interactive ray diagram tool.
15 Jul 2026
Snell's law calculator and interactive refraction simulator — find the angle of refraction and critical angle, and see total internal reflection live.
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.
26 Apr 2026
Lens formula calculator with five worked examples and the full sign convention — plus a film-plane bench for chromatic aberration and achromatic doublets.
20 Apr 2026
Why do roads look wet on hot days? The atmospheric optics of inferior mirages, superior mirages, and Fata Morgana — real physics, not illusions.
12 Jan 2018
Polarization, anaglyph filters, and active shutters — the physics of stereoscopic vision.