A laboratory course in experimental physics (1896)
Loudon, W. J. (William James), McLennan, John Cunningham, joint author · New York and London, Macmillan and Co. · leaf 61
cially applicable in finding the focallengths of combinations of lenses such as the objectives andeyepieces of optical instruments, or those used in photographiccameras. Note. — If non-achromatized lenses are used in these experi-ments, it is generally difficult for a beginner to decide wherethe… … Fig. 39. through the lens, become dispersed, and two pencils of colouredrays, DA C and FBE, are obtained. AD and BE will thereforebe red rays, and AC and BF violet, since the latter are morerefracted than the former. It will be readily seen from thefigure that any point between G and H may be said…
Physics
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