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Erschienen in:
2024 | OriginalPaper | Buchkapitel
8. Refraction, Dip and Mirage
verfasst von : Alexander Arnfinn Olsen
Erschienen in: Introduction to Celestial Navigation
Verlag: Springer Nature Switzerland
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Abstract
Light, or other wave energy, is assumed to travel in a straight line at uniform speed, provided the medium through which it is travelling has uniform properties. Thus, the speed of light in a vacuum is ‘c,’ but a light ray travelling through water will travel at an appreciably lower velocity, and in some peculiar forms of matter it is possible for light to travel at only a few meters per second.