Two identical closely spaced circular disks form a parallel-plate capacitor. transferring 2.1×109 electrons from one disk to the other causes the electric field strength between them to be 1.5×105 n/c .
what are the diameters of the disks?

While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.