Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 351
3. A Pure Spectrum. It is often inconvenient to use sunlight for this experiment,and we may substitute for itthe light from a projectinglantern. A suitable arrangement isillustrated in Fig. 402. Thelioht emerges from a narrowvertical slit in the nozzle ofthe lantern, and then pas.sesthrough a… … Fig. 402.—Showing how to produce a purespectrum. COLOURS OF NATURAL OBJECTS 341 The spectrum thus produced in purer than that obtained byNewtons simple method. Imagine the round hole used byNewton to be divided up into narrow strips parallel to theedge of the prism. Each strip will produce a…
Physics
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