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physical phenomena > process > physical process > optical process > radiation modification > radiation direction modification > refraction > astronomical refraction

astronomical refraction
subject			fact

astronomical refraction	has definition The change in direction of travel (bending) of a light ray as it passes obliquely through the atmosphere. As a result of refraction, the observed altitude of a celestial object is greater than its geometric altitude. The amount of refraction depends on the altitude of the object and on atmospheric conditions.
	is a kind of refraction
refraction	obeys Snell's law
radiation direction modification	changes property direction
optical process	has domain optics