The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 311
oom, andfall on a white wall, orscreen at W, where willbe seen a small roundspot of white light. In-terpose now a prism,P, and the ray, insteadof passing in a directline to W, will be re-fracted to S S, forming If a double-concave lens be employed, how will the image appear ? Uponwhat does this… … 306 DECOMPOSITION OF LIGHT. between those points an elongated spectrum^ composed of bandsof seven different colors insensibly passing into each other.These seven colors, of which the solar ray is composed, namely,red, orange, yellow, green, blue, indigo, and violet, wall appearin the spectrum in…
Physics
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