
All these circumstances are sufficient to satisfy us with respect to the truth of the explanation; and it is still more con- firmed by the effect of inclining the plates to the direction of the light; for <s>[text]<\s> for then, instead of dilating, like the <s>ring of the <\s> colours of thin plates, these rings contract: and this is the obvious consequence of an increase of the length of the paths of the light, which now traverses both mediums, obliquely; and the effect is every where the same as that of a thicker plate. It must however be observed, that the colours are not produced in the whole light that is transmitted through the medium: a small portion only of each pencil passing through the water, contiguous to the <s>common surface <\s> edges of the particle, is sufficiently coin- cident with the light transmitted by the neighbouring portions of air, to produce the necessary interference: and it is easy to show that, on account of the natural conca- vity of the surface of each portion of the fluid adhering to the two pieces of glass, a considerable portion of the light which is beginning <s>about <\s> to pass through the water, will be dissipated laterally by reflection at its entrance, and that much of the light passing through the air will be scattered by refraction at the second surface. For these reasons, the fringes are seen <s>even <\s> when the plates are not directly inter- posed between the eye and the luminous object, and, on account of the absence of foreign light, even more distinctly than when they are in the same right line with that object. And if we remove the plates to a considerable
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Manuscript details
- Author
- Thomas Young
- Reference
- L&P/12/32
- Series
- L&P
- Date
- 1800
- IIIF
-
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Cite as
An Account of Some Cases of the Production ofColours, Not Hitherto Described. Thomas Young., 1800. From The Royal Society, L&P/12/32
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