English Experiment showing refraction of radio waves...
English Diagram of Hertz's radio transmitter and receiver...
English Microwave refraction experiment by John Ambrose Fleming...
metal attached to wooden frame focuses radio waves from dipole antenna into a beam English Drawing by Heinrich Hertz of his 1893 spark radio transmitter...
with spark gap between them 58 17 133 65 594 241 Battery box English Replica of Hertz's spark radio transmitter and receiver for educational use 1912...
duplicate many of the experiments of Hertz demonstrating reflection, refraction, diffraction, and polarization of radio waves. Date 1 June 1894 Source...
