Ranking these parts of electromagnetic spectrum from lowest energy to highest energy is as follows ;
The longer the wavelength of a section of the EM spectrum the lower the energy carried while the shorter the wavelength and more the energy the electromagnetic wave will contain.
Hence ranking the electromagnetic waves in the electromagnetic spectrum from the lowest energy to the highest energy is ; Radio, Microwaves, Infrared, Visible, Ultraviolet, X-ray, Gamma waves.
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Gamma, Infrared,microwave,Radio, visible, ultraviolet,X-ray