The science of light, taught from first principles.
A growing library on physics optics — ray tracing, wave behavior, quantum phenomena, and the instruments that bend light to our will. Written for students, teachers, and the merely curious.
First-principles
Every article derives the math from scratch — no hand-waving past the interesting bits.
Ray + wave + photon
Three lenses on the same phenomena. Pick the level of abstraction you need.
Numerical worked examples
Calculations you can plug into your own derivations or test in the lab.
Open notebooks
Every diagram and simulation has reproducible code. Use it, fork it, share it.
The latest deep dive.
The most recent long-form treatment from our archive of optics.
Fiber Optic Bandwidth: 7 Key Facts & Wavelength Guide
Fiber optic bandwidth explained — how the 850, 1310, and 1550 nm wavelength windows work, why they matter for speed, and how WDM multiplies capacity. Complete technical guide.
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Every article is filed under a topic. Pick a category to dive into the science of light at the level you need.
What we've published lately.
Fiber Optic Cable Buying Guide: 7 Powerful Tips & Wiring
A practical fiber optic cable buying guide covering single-mode vs multimode, connector types (LC, SC, ST, MPO), jacket ratings, simplex vs duplex, pre-terminated vs field-terminated cables, basic wiring steps, and the tools you need.
Fiber Optic Lighting: 7 Stunning Facts & How It Works
Fiber optic lighting uses thin glass or plastic fibres to pipe light from a source to wherever you need it — with no electricity at the delivery point, almost no heat, and colours that never fade. This guide covers how it works, the two main types (end-glow and side-glow), system components, and applications from pools and museums to car dashboards and light piping.
Fiber Optic Network: 5 Key Components & Infrastructure Guide
A fiber optic network transmits data as light through glass fibres, enabling speeds far beyond copper. This guide covers the 5 key components, network architectures from FTTH to submarine cables, and how the whole system fits together.
How Is Fiber Optic Cable Made? 7 Proven Manufacturing Steps
How is fiber optic cable made? It starts with ultra-pure silica glass, formed into a preform through chemical vapour deposition, drawn into a hair-thin fibre on a towering draw machine, coated in protective polymer, and finally assembled into a finished cable with strength members and an outer jacket. Here is the full 7-step process from start to finish.
Optical Audio Cable: 5 Powerful Facts & Simple Setup Guide
An optical audio cable (TOSLINK) sends digital sound as pulses of light through a fiber optic strand. This guide covers how it works, how it compares to HDMI and coaxial audio, when to use it, and how to set it up for your home theater or sound system.
Optical Fibre Invention: 6 Key Facts & History
The optical fibre invention was not a single moment: it took over a century of work. This guide covers 6 key milestones — from Colladon's 1842 light-fountain to Kao's Nobel-winning 1966 prediction — and the scientists who made fibre optics a reality.