6.1 Electromagnetic Spectrum

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  • Created by: Twins 1&2
  • Created on: 16-06-13 16:09

6.1 Electromagnetic Spectrum

Electromagnetic radiations are electric and magnetic disturbances. They travel as waves and move energy form place to place. All electromagnetic waves can travel through a vacuum at the same speed (300 million m/s) but they have different wavelengths and frequencies. 

The spectrum is continious. The frequencies and wavelengths at the boundaries are approximate as the different parts of the spectrum are not precisely defined. 

Different wavelengths of electromagnetic radiation are reflected, absorbed or transmitted differently by different substances and types of surface. The higher the frequency of an electromagnetic wave the more energy it transfers. 

We can link the speed of the waves to their wavelength and frequency using:

v = f x 

  • v = wave speed (m/s)
  • f = frequency (Hz)
  • x = wavelength (m)
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6.1 Electromagnetic Spectrum

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