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1What's an electromagnetic spectrum?The electromagnetic spectrum is a continuous range of wavelengths. The types of radiation that occur in different parts of the spectrum have different uses and dangers - depending on their wavelength and frequency.
2Which radiation has the lowest frequencies but the longest wavelength?Radio waves have the lowest frequencies and longest wavelengths.
3Which radiation has the highest frequencies and the shortest wavelengths?Gamma waves have the highest frequencies and shortest wavelengths.
4What is frequency?We define frequency as to how often a wave cycle passes through a given point per second.