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Reflections on a Gramophone Record

Published online by Cambridge University Press:  03 November 2016

J. B. Lott
J. B. Lott*
Affiliation:
Gepp’s House, Felsted School, Essex
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Extract

When a point source of light is placed low over one side of a gramophone record and the eye is diametrically opposite it at about the same height, then the bright reflections on the record take the form of a rectangular cross, symmetrically placed. The direct image of the source is coincident with the centre of the record.

Type
Research Article
Information
The Mathematical Gazette , Volume 47 , Issue 360 , May 1963 , pp. 113 - 118
Copyright
Copyright © Mathematical Association 1963

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