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 239
-fleeted back on themselves there are nodal points, just 218 LrGHT LECT. as there are nodal points in sound-waves and in light-waves when reflected back. These nodal points werespaced out at distances apart exactly equal to half thewave-length, which thus could be precisely measured. Before Hertzs… … Detector Fig. 116. across a small air-gap, A, to a condenser made of a dielec-tric, D, between two metal plates, P and Q. I found thatif there was this spark-gap in the circuit of the coil I coulddraw secondary sparks at B from the outer plate of thecondenser; and by means of a small vacuum-tube…
Light · X-rays
Internet Archive · UBC Library · Public Domain Mark 1.0. Free to use for anything.
