all ranges of frequencies of radiant energy is called electromagnetic spectrum
full_spectrum_electromagnetic_emission is not radiation. electromagnetic_spectrum is not spectrum. luminous_energy is not radiant_energy. infrared_spectrum is spectrum. luminous_energy is radiant_energy. high_frequency_radiation is electromagnetic_radiation. electromagnetic_spectrum is spectrum. full_spectrum_electromagnetic_emission is radiation. radiant_energy is energy. radiant_energy is not energy.