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Unformatted text preview: is a form of radiation which is not visible to the human eye. It's in an invisible part of the "electromagnetic spectrum". Radiated energy, or radiation, is given oF by many objects: a light bulb, a crackling ±re, and stars are some examples of objects which emit radiation. X-rays are electromagnetic waves with wavelengths in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 Kev . Gamma-rays have the smallest wavelengths and the most energy of any other wave in the electromagnetic spectrum. These waves are generated by radioactive atoms and in nuclear explosions. They can kill living cells, they are used to kill cancer cells without having to resort to difficult surgery. This is called Radiotherapy....
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- Spring '16
- Electromagnetic spectrum