Quelques phénomènes de l'optique atmosphérique.
Abstract
Atmospheric optical effects resulting from the interaction between extended light sources (the sun and moon) or point sources (planets and bright stars) and the heterogeneous atmosphere are discussed. It is noted that refraction is responsible for such phenomena as the oblateness of the sun and moon when rising or setting, mirages (the curving of light rays near the ground), nocturnal scintillation, rainbows, and halos. The diffusion of light by particles in the atmosphere is responsible for the blue color of the sky during the day and the red color of the sky at sunrise and sunset. Diffractive phenomena discussed include the colored ring surrounding the sun or moon when viewed through fog and the iridescent Bishop's ring.
- Publication:
-
L'Astronomie
- Pub Date:
- October 1988
- Bibcode:
- 1988LAstr.102..351M
- Keywords:
-
- Atmospheric Optics;
- Atmospheric Refraction;
- Reflectance;
- Atmospheric Attenuation;
- Atmospheric Density;
- Atmospheric Scattering;
- Halos;
- Nightglow;
- Rainbows;
- Geophysics;
- Earth Atmosphere:Refraction;
- Refraction:Earth Atmosphere