Definitions
from The Century Dictionary.
- noun A name given by Tyndall to a luminous phenomenon, observed when the invisible heat-rays from an appropriate source are converged to a focus by a lens or mirror upon a piece of charcoal, which is thus heated to incandescence.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Physics) The conversion of obscure radiant heat into light; the transmutation of rays of heat into others of higher refrangibility.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun dated, physics The
absorption ofinfrared radiation and subsequentemission ofvisible light
Etymologies
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Examples
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In fact, carbon when perfectly dissolved and incorporated with a good white glass, is highly transparent to the calorific rays, and by employing it as an absorbent the phenomena of 'calorescence' may be obtained, though in a less striking form than with the iodine.
Fragments of science, V. 1-2 John Tyndall 1856
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[Footnote: On investigating the calorescence produced by rays transmitted through glasses of various colours, it was found that in the case of certain specimens of blue glass, the platinum foil glowed with a pink or purplish light.
Fragments of science, V. 1-2 John Tyndall 1856
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