Electromagnetic Waves

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  • Topic: Electromagnetic radiation, Electromagnetic spectrum, Ultraviolet
  • Pages : 3 (954 words )
  • Download(s) : 54
  • Published : February 5, 2013
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Miyuki Murakami 10D
SHOULD WE USE ELECTROMAGNETIC WAVES FOR MEDICAL PURPOSES?
In terms of definition, Electromagnetic Wave is a “non-particulate radiation (radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge)”. Thus, in simpler words, electromagnetic is a transmission of energy, caused by the oscillation and of electric and magnetic fields. The word electromagnetic wave or electromagnetic radiation may sound complex. However, without even noticing, electromagnetic waves have been subconsciously surrounds our everyday lives. It could be found in microwaves, TV, telephone, wireless signals or energy. Undoubtedly, there are two forms that waves could be transmitted; electromagnetic waves and mechanical waves, both waves transfers energy. On the other hand, a mechanical wave requires a medium in order to transmit energy; in contrast, electromagnetic wave does not. In addition, mechanical waves can be transverse and/or longitudinal, while electromagnetic waves are always transverse. Furthermore, electromagnetic waves could be specified into several types, which in other words is called the ‘Electromagnetic Spectrum’. Hence, those waves are scaled within a range from the lowest frequency with a long wavelength to the highest frequency with a short wavelength. In a chronologic order, those waves are: radio waves, microwaves, infrared, visible light, ultra violet, x-rays and lastly, gamma rays. Pursuing this further, radio waves; the one with the lowest frequency but the longest wavelength, is mainly used for communication. It could transmit signals to your radio, mobile phones and televisions. Nevertheless, radio waves are also divided into several types, which are: long wave, medium wave, VHF (Very High Frequency) and UHF (Ultra High Frequency). Secondly, microwaves are basically a form of radio wave but with an extremely high frequency. Microwaves could also be found in our...
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