Sunlight consists of different wave lengths of light. When combined they produce the ¡°white light¡± that we experience every day. Infrared light is in this spectrum¡¯s lower range, and although its rays aren¡¯t visible to the eye,it generates the warmth we feel on bright sunny days.
The complete specrum of sunlight consists of visible and invisible rays. The visible rasy are red, orange, yellow, green, indigo, bule, and violet in color, known as rainbow colors. The invisible rays are Ultra Violet, X-rays, Gamma, Cosmic, Microwave, Long Wave, Electrical Wave, and Infraread.
Electromagnetic waves between visible light and the microwave are called infrared waves. The wavelength of infrared waves range from 0.76 micro to 1,000 microns. The ranges of Near, Medium, and Far-Infrared Rays are 0.76 to 1.5 microns, 1.5 to 4 microns, and 4 to 1,000 microns respectively.
Infrared rays vary in wavelengths, and are categorized as near infrared, mid infrared and far infrared.
While these rays share the attributes listed below, they are most noticeable in far infrared waves.
Radiation: Infrared rays radiate or spread from a localized source.
Penetration: Unlike visible light, infrared rays can deeply penetrate skin and the underlying tissues up to 1.5 to 2.8 inches (approx.3.75¡«7cm).
Resonance: Infrared rays naturally generate heat by causign the bodys molecules to rapidly vibrate against each other.
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