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home:lifestyle:light:physics_of_light [04.06.2019]
sallieq [The spectrum]
home:lifestyle:light:physics_of_light [04.06.2019]
sallieq [Blocking incident radiation]
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   * Laser hair removal, because it targets hair follicles and heats them with infrared energy   * Laser hair removal, because it targets hair follicles and heats them with infrared energy
  
-===== Blocking incident radiation ​=====+==== Blocking incident radiation ====
  
 Ordinary window glass can block the UV wave lengths of invisible light, but it cannot block either the visible wave lengths of light nor can it block the IR wave lengths of invisible light. This effect is most noticeable when one feels the warmth of the sun's rays on the skin through the windows of a car, even if the windows are tinted, because some of the wave lengths can still penetrate the car windows. Window films, even those that claim to shield from UV and IR, that allow visible light to penetrate are not enough protection. Bright surfaces, like snow, concrete and sand, reflect UV light and can nearly double the amount that gets to the skin and eyes. Ordinary window glass can block the UV wave lengths of invisible light, but it cannot block either the visible wave lengths of light nor can it block the IR wave lengths of invisible light. This effect is most noticeable when one feels the warmth of the sun's rays on the skin through the windows of a car, even if the windows are tinted, because some of the wave lengths can still penetrate the car windows. Window films, even those that claim to shield from UV and IR, that allow visible light to penetrate are not enough protection. Bright surfaces, like snow, concrete and sand, reflect UV light and can nearly double the amount that gets to the skin and eyes.
home/lifestyle/light/physics_of_light.txt · Last modified: 04.06.2019 by sallieq
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