Newall, H. F · London : Society for Promoting Christian Knowledge · leaf 156
front ; if they fall on an object glass it shows in itsfocal plane a defined image of the distant slit fromwhich the light eman-ates. The definednessof this image dependson the width of thewavefront coming fromthe series of openings ;and the position of theimage is central behindthe openings. Now… … 146 THE SPECTROSCOPE AND ITS WORK [CHAP. wavelength where BN is drawn perpendicular toAN from B, the end of the next partition similarto A, and AN is drawn in the direction of thebeam considered. Then we have from each openinga small wavefront passing along in a directionparallel to AP, and each…
Spectroscope · Spectrum analysis
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
