As I understand it, the only real difference between radio, visible light, x-ray and everything in between is its wavelength. For instancew, radio has a very long wavelength, x-ray very short, visible in the middle somewhere. This means that radio can penetrate stuff (matter?) more effectively, among other things.
Radio waves are (essentially?) harmless, but shorter wavelengths are famously more dangerous, from sunburn all the way to straight up cancer and so forth. Why is that?
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It takes a certain amount of energy to break the chemical bonds in DNA. Longer wavelengths of light have lower energy photons that cant damage those bonds. X-ray photons are very high energy, when they collide with bonds in DNA they will break them and can cause mutations.
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