https://balancedlivingmag.com/what-is-the-science-behind-laser-hair-removal/

The laser plume is the smoke produced by the tool employed to eliminate hair. The laser that is used in this video is infrared radiation and completely invisible to the human eye. Since it’s capable of taking pulses of light, the video shows how the laser removes hair. Lasers are able to capture signals and in the video you can see the hair being pulverized.

The video below explains the reaction when you use a laser. Melanin, a chemical, is found in dark eyes, skin and hair. Melanin can absorb a wide spectrum of different wavelengths of light and is particularly effective in the ultraviolet part that is visible. This protects you from the sun’s ultraviolet radiation, and can help to get tanned. Your skin is now producing more and releasing less melanin.

Laser hair removal works due to the melanin contained in the hair that absorbs the light from the laser but not damaging the skin. It is best for people who have dark hair with light skin.
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