Preston, Thomas, Joly, Charles Jasper, 1864-1906, Parsons, John Herbert, Sir, 1868-1957, donor, University College, London. Library Services · London : Macmillan and Co. · leaf 189
TALBOT'S BANDS ART. 106 165 At L it is situated directly between the eye of the observer and the … An imperfect explan- Fig. 89.— Talbot's Bands. ation of the bands was given by Talbot on the principle of simple interference. Thus if 8 be the retardation suffered by any ray, of wave length X, in passing through the plate, then one -half of the light passing through the aperture will be retarded…
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