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Author Bappu, M. K. V.
Source Indian Institute of Astrophysics
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword Spectroscopic Study ♦ Amethyst Quartz ♦ Coloured Quartz
Description In this paper a detailed study is made of the absorption of light in the visible region by amethyst quartz. It is found that in the visible region, an absorption band, the so called F-band appears, which decreases in intensity at high temperature the maximum also shifts ton~ardslo nger u~arelengths; but the number of colour cenires remain constant till about zoirEC. At higher fen~peratures these centres, which are responsible for the absorption, are destroyed by heat. When the crystal is exposed to radiation absorbed by the F band, a new F'-band appears. The facts reveal that the coloration is due fo exposure to some penetrating radiations.
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Institution Indian Association for the Cultivation of Science
Journal Indian Journal of Physics
Volume Number 26
Issue Number 1
Page Count 14
Starting Page 1
Ending Page 14