The Hertzian oscillator loses mass in the emission process, and momentum is conserved in any frame.
2.
The first primitive radio transmitters ( called Hertzian oscillators ) were built by German physicist Heinrich Hertz in 1887 during his pioneering investigations of radio waves.
3.
However, Poincar?s resolution led to a paradox when changing frames : if a Hertzian oscillator radiates in a certain direction, it will suffer a recoil from the inertia of the fictitious fluid.
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