Newall, H. F · London : Society for Promoting Christian Knowledge · leaf 151
, and that a bright bandis the result of superposition of waves in similarphase, crest on crest and trough on trough, resultingin considerable motion or disturbance. We willrevert later to the appearance of colour at the edgesof the bands. Let us consider two aspects of the phenomena described :… … XIV] DIFFRACTION AND WAVELENGTHS 141 been spread out into these bands (Fig. 51) an indica-tion of the mode in which the defining or resolvingpower of the eye has been reduced. The definingpower of the eye depends on the size of theaperture of the pupil just as the defining power ofa telescope…
Spectroscope · Spectrum analysis
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-565-381.webp)
