Carhart, Henry S. (Henry Smith), 1844-1920 · Boston : Allyn and Bacon · leaf 314
t of the perpendicular from c on ab shall equalsome definite wave-length of lightX. Then an will be an exactnumber of wave-lengths n\, co willbe (w — 1) X, and so on. The linemn will therefore touch the frontof a series of secondary waves from the successive transparent openings, all in the same… … Fig. 150. 304 LIGHT. Let 6 be the angle between ab and the direction of thelight incident on AS. Then ae = A, = d sin #, where c? is the distance ae from centre to centre of theopenings. The disturbance at the focus of the lens willbe the resultant of all the disturbances coming from thenumerous…
Physics
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