Which physical quantity if any has the same value for waves belonging to the different parts of the electromagnetic spectrum?

When can a charge act as a source of electromagnetic wave? How are there directions of electric and magneitc field vectors, in an electromagnetic wave related to each other and to the direction of propagation of the wave? Which physical quantity, if any has the same value for waves belonging to the differnt parts of the electromangetic spectrum?

The physical quantity strain has:

Name the main parts of electromagnetic spectrum.

Which physical quantity has its unit kWh?

Which physical quantity has the same unit as moment of force?

Which rays are not the protion of electromagnetic spectrum?