Radio waves the least energyhave the longest wavelengthshave the most energyhave the shortest wavelengths

The electromagnetic spectrum can be defined as the collection of electromagnetic radiations that exhibit difference in range  of frequencies,wavelength and photonic energy. The longer wavelength, high frequencies contributes to low energy to the radiation.

Radio waves exhibit longest wavelength, lowest frequency in the electromagnetic spectrum which are responsible for it's low energy.

biology is the study of life. it is the study of living organism.