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File:Feynman ratchet.png

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Feynman_ratchet.png (286 × 187 pixels, file size: 25 KB, MIME type: image/png)

Summary

Description
English: Schematic figure of a Brownian ratchet (Feynman-Smoluchowski ratchet), a simple hypothetical mechanism used in a thought experiment by Marian Smoluchowski and Nobel laureate Richard Feynman to demonstrate the laws of thermodynamics.
The device is a tiny paddlewheel attached to a ratchet. It appears to be an example of a Maxwell's Demon, able to produce useful work from the random thermal motion of molecules at a constant temperature in violation of the Second Law of Thermodynamics. Feynman and others showed why it cannot actually produce work if T1 = T2
Esperanto: Skema bildo de Brown-a kliko.
Español: Esquema del trinquete de Feynman.
Italiano: Figura schematica della ruota (ratchet) di Feynman.
Polski: Schemat zapadki.
Sicilianu: N'apparecchiu dû fisicu Feynman.
Source Own work
Author Bdkoivis

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An other image of the same Feynman's machine. (image)

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Licensing

Public domain This work has been released into the public domain by its author, Bdkoivis. This applies worldwide.
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Bdkoivis grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

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Date/TimeThumbnailDimensionsUserComment
current16:38, 14 July 2007Thumbnail for version as of 16:38, 14 July 2007286 × 187 (25 KB)Bdkoivis{{Information |Description= |Source=self-made |Date= |Author= Bdkoivis }}

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