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Refraction

noun

The change in direction of a propagating wave (light or sound) when passing from one medium to another.

The amount by which a propagating wave is bent. Synonyms: deflection, deflexion.

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angle of refraction

double refraction

index of refraction

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"Refraction" Quotes from Famous Books

... shone a vision of the land; this time not in the sharp peaks and spires we had first seen, but in a chain of pale blue egg-shaped islands, floating in the air a long way above the horizon. This peculiar appearance was the result of extreme refraction, for, later in the day, we had an opportunity of watching the oval cloud-like forms gradually harden into the same pink tapering spikes which originally caused the island to be called Spitzbergen: nay, so clear did ...

— Letters From High Latitudes • The Marquess of Dufferin (Lord Dufferin)

... is largely used in making chemical glassware, since it resists the action of reagents better than the softer sodium glass. If lead oxide is substituted for the whole or a part of the lime, the glass is very soft, but has a high index of refraction and is valuable for making optical ...

— An Elementary Study of Chemistry • William McPherson

... conditions are entirely different. As we ascend the air becomes rarer. It has less moisture, because a wet atmosphere, being heavier, lies nearer the surface of the earth. Being rarer the action of sunlight on the particles is less intense. Reflection and refraction of the rays acting on the light atmosphere do not produce such a powerful effect as on the ...

— Aeroplanes • J. S. Zerbe***

... experiments made by the pupil, and this book, by considering the difficulty of costly apparatus, has rendered an important service to teacher and student alike. It deals with the sources of light, reflection, refraction, and decomposition of light. The experiments are extremely simple and well suited to ...

— Freedom in Science and Teaching. - from the German of Ernst Haeckel • Ernst Haeckel

... but if it, in passing from one medium to another of different density, fall obliquely, it is bent from its direct course and recedes from it, either towards the right or left, and this bending is called refraction; (see Fig. 3, b.) If a ray of light passes from a rarer into a denser medium it is refracted towards a perpendicular in that medium; but if it passes from a denser into rarer it is bent further from a perpendicular in that medium. Owing to ...

— The History and Practice of the Art of Photography • Henry H. Snelling

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