The Electromagnetic Spectrum

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The longest wavelength is the radiowave with a length of 10 to the power of 3 metres and the shortest wavelength is gamma which has a wavelength of 10 to the power of -12 metres. 

Radio waves

Radiowaves are used for communications and broadcasting.


Microwaves are used for cooking and for mobile phones/communications. They can be dangerous as they can heat body cells and kill body cells. 




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