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)
ter from which thereflection takes place. Halos are prismatic rings seen around the sun or moon, varyingfrom 2° to 40^^ in diameter, caused by reflection from minute crystalsof ice floating in the air. Coronas are formed about the moon by reflection from the externalsurfac3 of aqueous vapor, the… … dent that white light will be dispersed by convex lenses, in the samemanner as by prisms, producing all the colors of the spectrum. ^50 OPTICS. Let F be an object situated beyond the principal focus of the lens L;Avhich, having the same effect as the two inscribed prisms, will refractthe most…
Physics · Astronomy
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