Bowing_chladni_plate.png
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Summary
Description Bowing chladni plate.png |
English:
Drawing showing how vibrations are excited in a
Chladni plate
with a violin bow to create the sand figures of nodal lines called
Chladni figures
, from an 1879 textbook on acoustics. A metal plate vibrating at resonance is divided into separate regions vibrating in opposite directions bounded by lines of zero vibration called
nodal lines
. A plate can have many different vibration modes, each with a different pattern of nodal lines. German physicist and musician
Ernst Chladni
discovered around 1787 that these nodal lines could be made visible by sprinkling sand on a metal plate and exciting vibrations in it by drawing a violin bow across the edge, as shown. The sand collects along the nodal lines where the surface is stationary; the resulting patterns are called
Chladni figures
. One is visible on the surface. The image also illustrates how different vibrational modes can be excited by touching the plate in different places with the free hand while bowing. Alterations to image: none.
|
Date | |
Source | Downloaded 2012-11-26 from William Henry Stone (1879) Elementary Lessons on Sound , Macmillan and Co., London, p. 26, fig. 12 on Google Books |
Author | Unknown author Unknown author |
Permission
( Reusing this file ) |
Public domain - published 133 years ago in British book. Searched source for illustration credits, didn't find any. |
Licensing
Public domain Public domain false false |
This UK artistic or literary work, of which the author is
unknown
and cannot be ascertained by reasonable enquiry, is in the
public domain
because it is one of the following:
This tag can be used only when the author cannot be ascertained by reasonable enquiry. If you wish to rely on it, please specify in the image description the research you have carried out to find who the author was. The above is all subject to any overriding publication right which may exist. In practice, publication right will often override the first of the bullet points listed. Unpublished anonymous paintings remain in copyright until at least 1 January 2040. This tag does not apply to engravings or musical works. More information |