. An elementary book on electricity and magnetism and their applications. FlG. 393. — Curve of oscillatoryelectric discharge. PLATE Heinrich Rudolf Hertz (1857-1894). One of the most brilliant of German physicists; died at the age of thirty-sevenand yet had made notable contributions to theoretical physics. Made thehighly important experimental discovery of the electromagnetic waves pre-dicted by Maxwell. The application of this discovery was later made inradiotelegraphy. ELECTROMAGNETIC WAVES 545 ing spark occurs when the dielectric is relieved by the sparkbreaking through, and then the
. An elementary book on electricity and magnetism and their applications. FlG. 393. — Curve of oscillatoryelectric discharge. PLATE Heinrich Rudolf Hertz (1857-1894). One of the most brilliant of German physicists; died at the age of thirty-sevenand yet had made notable contributions to theoretical physics. Made thehighly important experimental discovery of the electromagnetic waves pre-dicted by Maxwell. The application of this discovery was later made inradiotelegraphy. ELECTROMAGNETIC WAVES 545 ing spark occurs when the dielectric is relieved by the sparkbreaking through, and then the electric current surges back andforth like the spiral spring when it is released. Now these vibrations of electricity, which really pass throughthe entire apparatus, are capable of setting up waves in theether which pass out in all directions, but more strongly ina direction at right angles to the spark gap and the wings CC(Fig. 392). The ether waves which are created in this mannerare called electromagnetic waves. To detect these wavesHertz used a ring of wire contain-ing a small spark gap, such as isshown in figure 394. When thi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmagnetism, bookyear19
