Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
—OPTICAL IXSTRUMENTS. ^oo. Fig-lire 1. —Effects of a drop of water upon parallelrays of light, further explained.—Let the circle repivseut udrop of water, and 8. T, H, F, parallel rays falling upon it. The rayF. being perpendicular to the drop, will pass straight throngli it, asshown; though a… … fiice and tlien refracted in the direction of Y, making a certain anglewith its original direction H. As the distance of the incident ray fromthe centre increases, the emergent ray will make a greater angle withthe incident ray, until a distance is reached where the angle formed bythe incident and…
Physics · Astronomy
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