Light visible and invisible : a series of lectures delivered at the Royal Institution of Great Britain, at Christmas, 1896 (1897)
Thompson, Silvanus Phillips, 1851-1916, Royal Institution of Great Britain · New York : Macmillan · leaf 42
ont that strikes first against the bulging curve isthe earliest to be reflected back. The other parts strikethe surface later, and when reflected back have fallenbehind; so that the ripples come back curved—thecurved mirror has, in fact, imprinted upon the ripplesa curvature twice as great as its… … Fig. *3- cing wave first and turns that bit back. If there hadbeen no obstacle the wave would, after a short intervalof time, have got as far as A. But where will it actuallygo to ? The bit that strikes M will go back as far asB; the bit marked a will go on a little, and then bereflected back.…
Light · X-rays
Internet Archive · UBC Library · Public Domain Mark 1.0. Free to use for anything.
