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# Electromagnetic Spectrum

Introduction: When you look around, what you can see is the direct result of what is known as the electromagnetic spectrum – a distribution of electromagnetic waves on the basis of energy. Specifically, you see a part of the electromagnetic spectrum known as visible light. Electromagnetic waves are vibrations of electric and magnetic fields, resulting from a charged particle being accelerated. The equation for energy is given as follows:
$E=hf={hv}/λ$, where f=frequency, v=speed, λ=wavelength, h=Planck’s constant=$6.63 x 10^-34 J•s$

Visible light, in particular, has a very narrow range of wavelengths and frequencies compared to the rest of the electromagnetic spectrum. Other portions of the electromagnetic spectrum that are used in everyday life include infrared radiation and microwaves. In the electromagnetic spectrum, as the energy increases, the frequency will increase, while the wavelength tends to decrease. The part of the electromagnetic spectrum with the longest wavelength and lowest frequency corresponds to radio waves. The part of the spectrum with the shortest wavelength and highest frequency corresponds to gamma rays.

Without the electromagnetic spectrum, frequencies and wavelengths could not be adjusted for appropriately for use in everyday life. Taking advantage of scientific knowledge of the electromagnetic spectrum is the key to measuring and detecting that which cannot be seen with the naked eye. Examples of applications of the electromagnetic spectrum include the use of infrared radiation in night vision to determine appropriate heat signatures and microwaves in cooking. X-Rays are used to create scans of the body to detect any potential diseases and damages to the body.

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