The Tyndall Effect
Updated 2026-08-08
INTRODUCTION
English translation pending.
CORE DEFINITION
Named after physicist John Tyndall, who studied the phenomenon in the nineteenth century. When a beam of light passes through a colloid such as fog, smoke, or dilute milk, particles of the right size scatter the light and the beam's path becomes visible from the side. A true solution such as salt water shows no such path because its dissolved particles are too small to scatter visible light. The effect distinguishes colloids from solutions.
SCAFFOLDING EFFECT
Reduce cognitive load
- Test transparency: assume an opaque system may still contain suspended problems invisible until probed - Shine the light: use an audit, a crisis, or an outside review to reveal what routine operations hide - Read the beam: treat a visible trail under scrutiny as evidence of many small irregularities rather than one large fault
Anchor fast decisions
Particles larger than a few nanometres scatter light in all directions, so a beam passing through a colloid becomes visible along its whole path. Dissolved molecules are far smaller and scatter too weakly to be seen. The effect therefore reveals suspended particles even when the medium looks completely clear to the eye.
MINIMUM ACTION
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Tyndall_effectverified
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