Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..55...39o&link_type=abstract
Astrophysics and Space Science, vol. 55, no. 1, May 1978, p. 39-47.
Astronomy and Astrophysics
Astrophysics
3
Cosmic Dust, Iron, Metal Particles, Thermal Emission, Metal Grinding, Polarization Characteristics, Thermoluminescence, Tribology
Scientific paper
A report is given of some laboratory experiments on the thermal emission of glowing iron flakes. Clear effects of polarization are found sometimes in flakes of small size, indicating polarization of a kind similar to that appearing in the thermal emission from narrow metallic filaments. Sudden flashes of light appear in the thermal emission from flakes produced in a grinding wheel. At the same time the flake splits into two parts. It is suggested that the flash is due to tribo-thermoluminescence. It seems possible that the infrared radiation of the solar corona may contain a faintly polarized component due to thermal emission from dust particles.
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