#optics

4 articles

Optics: How Light Bends and Focuses

Light bends when its speed changes crossing a boundary — that is refraction — and lenses harness the same effect to focus rays and form real or virtual images.

10 min read·Sep 2, 2026

Physics

Maxwell's Equations and the Nature of Light

Maxwell combined everything known about electricity and magnetism, found a self-sustaining wave hiding in the algebra, and computed its speed from two bench-top constants. The answer was the speed of light.

10 min read·Jul 17, 2026

Astronomy & Cosmology

Telescopes: Gathering Light, Resolving Detail

Why a telescope's real job is gathering light and resolving detail — set by aperture area and diffraction — while magnification is cheap, swappable, and often useless.

10 min read·Jul 16, 2026

Medicine

Vision: How the Eye Works

The eye focuses a real, inverted image onto a retina that is sharp only in a tiny central spot and blind where the nerve leaves — and the brain reconstructs the vivid, uniform world you think you see.

10 min read·Jul 7, 2026