Radio waves  - Harmless wavelengths that can be hundreds of meters longs, Microwaves - Relatively harmless but can cause heating of water molecules that can damage tissue, Infrared - Carries thermal energy and can cause severe/mild tissue burns, Visible Light - Can be detected by photoreceptors like cone and rod cells, Ultraviolet light - High frequency light that can easily kill microorganisms , X - rays - High frequency waves that can penetrate skin and thick organ tissue but not bone, Gamma rays - The highest frequency waves that can penetrate thick solid objects like metal and thick concrete ,

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