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 148
and-down, and a part which is right-and-left in Ill POLARISATION OF LIGHT 127 direction. The model (Fig. 91) is fixed upon a board,on the corner of which is drawn a little diagram. Sup-pose the oblique motion to be from A to B, then you canresolve that oblique motion into two parts—a verticalpart… … Fig. 91. single oblique resultant along the diagonal of the paral-lelogram of which the two component forces are sides.Well our present problem is simply the converse to that.Here in the model are two wooden slides, with cross-heads. One can slide up-and-down only : the otherright-and-left only.…
Light · X-rays
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