Newton's rainbow explanation,1704

Numéro d’image : 11904652
Newton's rainbow explanation,1704
Newton's rainbow explanation. Diagrams explaining the optics of a rainbow,by the English physicist,mathematician and astronomer Sir Isaac Newton (1643-1727). The diagrams were published in his famous work Opticks (1704). The main diagram shows the refraction and reflection of sunlight (S) inside raindrops (circles). In the main rainbow (bottom,E and F) the rays are refracted twice and reflected once. In the secondary rainbow (upper,G and H) the rays are refracted twice and reflected twice. This is also shown in the surrounding diagrams. This causes the secondary rainbow to be both fainter,and have its colours reversed. This explanation dates back before Newton to Theodoric of Freiberg in 1307
Licence : Droits gérés
Crédit: Science Photo Library / Royal Astronomical Society
Taille de l’image : 3780 px × 4900 px
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