| 释义 |
Terrestrial refraction
| the change in the apparent altitude of a distant point on or near the earth's surface, as the top of a mountain, arising from the passage of light from it to the eye through atmospheric strata of varying density. |
See also: Refraction terrestrial refraction
terrestrial refraction[tə′res·trē·əl ri′frak·shən] (optics) Any refraction phenomenon observed in the light originating from a source lying within the earth's atmosphere; this is applied only to refraction caused by inhomogeneities of the atmosphere itself, not, for example, to that caused by ice crystals suspended in the atmosphere. |