Graph centered on Perrin Brownian-motion experiments, showing the selected concept and its surrounding relations.Preparing the interactive atlas…

Keyboard graph navigation: press N for concepts or E for relations; use arrow keys, Home, and End to move; Enter selects; Shift plus Enter selects and centers; plus and minus zoom; zero fits; Escape clears the selection. Use the visible viewport buttons as alternatives to dragging, wheel, and pinch gestures.

Curated starting points

Stories & Views

Relationship-aware analysis

Compare concepts

Choose two concepts to compare or connect.
Reading the graph

Guide to the Atlas

Canonical static concept record

Perrin Brownian-motion experiments

Open this concept in the interactive graphRead the Markdown equivalent

Summary

Jean Perrin’s quantitative studies of Brownian particles tested Einstein’s statistical theory, estimated Avogadro’s number by several methods, and supplied strong evidence for molecular and atomic reality.

Record metadata

Concept sources

Incoming relations (arrows to this concept)

Each relation below ends at this concept.

AtomPerrin Brownian-motion experiments

Permalink to relation

This is an authored directed relation from the source endpoint to the target endpoint.

Authored explanation

Agreement among Brownian-motion measurements of molecular scales and Avogadro’s number provided strong evidence that atoms and molecules are physical constituents rather than merely calculational devices.

How to interpret this relation type

The source theory, law, entity, prediction, or structural claim is directly tested, supported, constrained, or established by the target experiment or observation. Experimental support is not final logical proof; the edge detail states exactly what was measured.

Relation sources

Outgoing relations (arrows from this concept)

Each relation below starts at this concept.

No direct relations are authored in this direction.