Radio Waves - NASA Science

How Does a Radio Convert Waves into Sound? | Britannica

The Hydrogen Maser. You can use the radio waves generated by a hydrogen maser as a standard of frequency. The frequency of these waves is 1,420,405,751.786 hertz. (A hertz is another name for one cycle per second.) A clock controlled by a hydrogen maser is off by only 1 s in 100,000 years. For the following questions, use only three significant figures. The large number of significant figures given for the frequency simply illustrates the remarkable accuracy to which it has been measured.) (a) W