(Otherwise called "The Light of Life")
Far Infra Red Rays is a type of electromagnetic wave, like that of invisible rays. We know that Far infrared Rays are a spectrum of sunlight. Sunlight can be categorized as visible and invisible rays. Visible rays include those that we can see in the spectrum of sunlight such as red, orange, yellow, green, blue, indigo and violet whereas invisible rays can either be gamma rays, x-rays or ultraviolet rays. These have much shorter Electro waves as compared to visible rays and are extremely penetrative. A German scientist named Sir William Herschel in 1800 while he was carrying out sun spectrograph research discovered infrared rays. His research led to the discovery that while there were the known visible and invisible rays as described above, there was a third previously unknown invisible ray. This ray has extremely strong heat reaction and is between 0.75 microns and 1000 microns. It was after named infrared rays. Infrared rays are categorized as: