Snell's Window

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Geliefert zwischen Mi., 18.02.2026 und Do., 19.02.2026

Details

High Quality Content by WIKIPEDIA articles! Under ideal conditions, a fish looking up at the water surface from underneath sees a perfectly circular image of the entire above-water hemisphere from horizon to horizon. Due to refraction at the air/water boundary, Snell's window compresses a 180° angle of view above water to a 97° angle of view below water, which is probably the origin of the term "fisheye lens". The brightness of this image falls off to nothing at the circumference/horizon because more of the incident light at low grazing angles is reflected rather than refracted. Refraction is very sensitive to any irregularities in the flatness of the surface (such as ripples or waves), which will cause local distortions or complete disintegration of the image. Turbidity in the water will veil the image behind a cloud of scattered light.

Weitere Informationen

  • Allgemeine Informationen
    • GTIN 09786131062308
    • Editor Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
    • Genre Geowissenschaften
    • Anzahl Seiten 68
    • EAN 9786131062308
    • Format Fachbuch
    • Titel Snell's Window
    • Herausgeber Betascript Publishing

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