... Think about how much energy you are expending to create this wave; that is, how fast do you get tired? ... How has the wavelength changed? ... The same concept applies to electromagnetic radiation. ... Unit for unit, long-wavelength radiation (such as radio waves) transmits less energy than short wavelength radiation (such as x-rays). ... For the same reasons, ultraviolet radiation is more dangerous than visible light. The different types of radiation can also be defined by their frequency. ...