Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 607
Fig. 566 lieing the focal length of the lens ; thus, light from the illuminated slit, «,forms a parallel pencil on emerging from the lens b. This pencil enters … the prism P. On leaving the prism the light is decomposed, and in thisstate falls on the lens .r. I5y this lens r a real image of the spectrumis formed at the principal fo( us of .r. This image is seen by the observer 590 On Light [587-
Physics
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