The energy of an electromagnetic wave changes proportionally to which other property?

A. Frequency
B. Speed
C. Shift
D. Wavelength

I know it’s not wavelength

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

If y gets smaller as x gets bigger and y have an relationship?

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.