What is the Electromagnetic Spectrum?
Radiation exists all around us, from both natural and manmade sources, and is in two forms: ionizing and non-ionizing radiation.
Radiation is everywhere and in everything that gives off energy. This includes the Earth!
When we look at the world around us we are seeing visible light waves (or visible radiation). However, there are many other forms of radiation that we cannot see with our eyes. These types include gamma rays, x-rays, ultraviolet, infrared, microwaves and radio waves. Together with visible light, all these types of radiation make up what we call the electromagnetic spectrum – the complete spectrum of radiation.
Electromagnetic radiation travels in waves which have different wavelengths, energies and frequencies.
The wavelength is the distance between individual waves (e.g. from one peak to another). The wavelengths of visible light range between 400 to 700 billionths of a meter. But the entire electromagnetic spectrum extends from one billionth of a meter (for gamma rays) to meters (for some radio waves). The frequency is the number of waves which pass a point in space each second. Visible light frequencies range between 430 trillion waves per second (red) and 750 trillion waves per second (violet). The entire electromagnetic spectrum has frequencies between less than 1 billion waves per second (radio) and greater than 3 billion billion waves per second (gamma rays). Light waves are waves of energy and the amount of energy in a wave is proportional to its frequency. Wavelength increases, while frequency and energy decreases as we go from gamma rays to radio waves.
To visualize these different spans of waves, scientists came up with the Electromagnetic Spectrum. Virtually all energy falls somewhere on this Electromagnetic Spectrum.
Visible energy or light energy we experience with our eyes falls in the middle of the spectrum. Visible light energy is considered safe and non-harmful.
On the right side of the spectrum you have what they call ionizing (high energy) radiation, which is harmful. Ultraviolet light can cause things like mutated skin cells and melanoma. Further out on the spectrum you have X-rays and Gamma rays which can effect atomic structure.
Non-ionizing radiation produces lower energy waves and seems harmless enough. After all, it’s lower on the spectrum than visible light. True, but the sun has been producing ‘natural’ light for millions of years while man-made EMF’s have only been around since this past century and scientific studies show evidence that our bodies are not adapted to properly deal with it.
Frequencies on the Electromagnetic Spectrum
The Frequency (F) spectrum starts at near zero (0) and can extend indefinitely. The Wavelength (W) spectrum also starts near zero and extends indefinitely in reverse.
Below are frequency band designations, nominal frequency ranges, nominal wavelengths, and their application uses.
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* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.