American Dictionary of the English Language, Vol. 1

Contents:
Author: Noah Webster

Achromatic

ACHROMAT’IC, a. [Gr. priv. and color.]

Destitute of color. achromatic telescopes are formed of a combination of lenses, which separate the variously color rays of light to equal angles of divergence, at different angles of refraction of the mean ray. In this case, the rays being made to refract towards contrary parts, the whole ray is caused to deviate from its course, without being separated into colors, and the optical aberration arising from the various colors of light, is prevented. This telescope is an invention of Dolland.

Contents:

Related Resources

None available for this document.

Download Options


Title: American Dictionary of the English Language, Vol. 1

Select an option:

*Note: A download may not start for up to 60 seconds.

Email Options


Title: American Dictionary of the English Language, Vol. 1

Select an option:

Email addres:

*Note: It may take up to 60 seconds for for the email to be generated.

Chicago: Noah Webster Jr., "Achromatic," American Dictionary of the English Language, Vol. 1 in An American Dictionary of the English Language, Vol. 1 (New York: S. Converse, 1828), Original Sources, accessed March 29, 2024, http://www.originalsources.com/Document.aspx?DocID=PWJE4H9QVR4GFGZ.

MLA: Webster, Noah, Jr. "Achromatic." American Dictionary of the English Language, Vol. 1, in An American Dictionary of the English Language, Vol. 1, New York, S. Converse, 1828, Original Sources. 29 Mar. 2024. http://www.originalsources.com/Document.aspx?DocID=PWJE4H9QVR4GFGZ.

Harvard: Webster, N, 'Achromatic' in American Dictionary of the English Language, Vol. 1. cited in 1828, An American Dictionary of the English Language, Vol. 1, S. Converse, New York. Original Sources, retrieved 29 March 2024, from http://www.originalsources.com/Document.aspx?DocID=PWJE4H9QVR4GFGZ.