杜德伟翻唱的英文歌:●●●帮我翻译下 我会给你加赏的 谢谢我急用●●●●●

The first experiment he did is a radiator. First of all he used a pair of wires with one meter long and remained a little spark gap in the center connected to an induction coil as a radiator. He placed two large spheres at the ends, Which is used to adjust capacity of the circuit for resonance. Just like the picture shown below:
In his experiments, Hertz first employed a pair of one meter wires with a spark gap in the center connected to an induction coil as a radiator. The large spheres at the ends were used to adjust the capacity of the circuit for resonance. His receiver was a loop of wire with a small gap across which a small spark could be observed when the radiator discharged. The receiver was placed several yards from the oscillator. When these rods were given charges of opposite signs, strong enough to spark, the current would oscillate back and forth across the gap and along the rods. With this oscillator, Hertz solved two problems: 1) timing Maxwell's waves (he had demonstrated, in the concrete, what Maxwell had only theorized: that the velocity of radio waves was equal to the velocity of light), and 2) how to make the electric and magnetic fields detach themselves from wires and go free as Maxwell's waves.