refraction correction

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• refraction correction — noun (astronomy) The correction made in the calculation of the altitude of a star, planet, etc to allow for the refraction of its light by the earth s atmosphere • • • Main Entry: ↑refract …   Useful english dictionary

• refraction correction — /rəˈfrækʃən kərɛkʃən/ (say ruh frakshuhn kuhrekshuhn) noun the small correction which has to be made to the observed altitude of a celestial body due to the refraction by the earth s atmosphere of the light which it emits or reflects …  

• Réfraction astronomique — Réfraction atmosphérique Photographie de la Lune partiellement obscurcie par l atmosphère terrestre, prise depuis la navette spatiale Discovery. On remarque que la forme apparente de la Lune dans sa partie basse n est plus circulaire en raison de …   Wikipédia en Français

• Réfraction terrestre — Réfraction atmosphérique Photographie de la Lune partiellement obscurcie par l atmosphère terrestre, prise depuis la navette spatiale Discovery. On remarque que la forme apparente de la Lune dans sa partie basse n est plus circulaire en raison de …   Wikipédia en Français

• Refraction — Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a different… …   The Collaborative International Dictionary of English

• Refraction circle — Refraction Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a… …   The Collaborative International Dictionary of English

• Refraction of latitude — Refraction Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a… …   The Collaborative International Dictionary of English

• Réfraction atmosphérique — Photographie de la Lune partiellement obscurcie par l atmosphère terrestre, prise depuis la navette spatiale Discovery. On remarque que la forme apparente de la Lune dans sa partie basse n est plus circulaire en raison de la réfraction… …   Wikipédia en Français

• Refraction — In ophthalmology, the bending of light that takes place within the human eye. Refractive errors include nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. Lenses can be used to control the amount of refraction, correcting… …   Medical dictionary

• refraction — noun Date: 1603 1. deflection from a straight path undergone by a light ray or energy wave in passing obliquely from one medium (as air) into another (as glass) in which its velocity is different 2. the change in the apparent position of a… …   New Collegiate Dictionary

• Angle of refraction — Refraction Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a… …   The Collaborative International Dictionary of English