○Discovery of Infrared and Far Infrared○~Trivia No. 1

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last updated：Aug 21, 2019

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The wavelength range of 3 to 1000 μm in infrared is called far infrared.

It is widely known that sunlight is dispersed into seven colors from red to violet when passing through a prism. It is said that Newton was the first to study this scientifically. This is because the wavelength decreases and the refractive index increases as one moves from red to violet. In 1800, the British astronomer Herschel discovered that the temperature rises in the invisible part beyond the red visible light. Since it is located beyond red (with a longer wavelength), it was named infrared. 【Trivia: Basics of Far Infrared】 ○ Discovery of infrared ○ Positioning of far infrared ○ Effects of far infrared For more details, please contact us or download the catalog.

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**Discovery of Infrared and Far Infrared** - Infrared is a type of electromagnetic wave. - Its effects on objects vary depending on the wavelength. → It is classified into gamma rays, X-rays, ultraviolet rays, visible light, infrared, microwaves, and radio waves. - Infrared can be divided into near-infrared and far-infrared based on its effects. - The wavelength range of 0.78 to 3μ is called near-infrared, while the range of 3 to 1000μ is called far-infrared. - The range of 3 to 20μ within far-infrared is considered effective for heating. - As the wavelength increases, the energy weakens, and its applications become related to sensing. - Far-infrared heaters that emit wavelengths of 3μ or more are effective for heating most materials. → The absorption of energy from far-infrared heaters is very good, leading to rapid temperature rise. - The large energy received at the surface quickly conducts as heat flow into the interior of the material. - This results in minimal temperature difference between the surface and the interior when heating the material, allowing it to reach the desired temperature in a short time. For more details, please contact us or download the catalog.