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  Indian J Med Microbiol
 

Figure 1: Visible light, which covers the range of 400-700 nm of all electromagnetic radiation, is most relevant to photodynamic therapy (PDT). The range of light used in PDT is generally >600 nm. This is because endogenous molecules, such as hemoglobin, absorb light strongly at wavelengths of <600 nm and therefore capture most of the incoming photons

Figure 1: Visible light, which covers the range of 400-700 nm of all electromagnetic radiation, is most relevant to photodynamic therapy (PDT). The range of light used in PDT is generally >600 nm. This is because endogenous molecules, such as hemoglobin, absorb light strongly at wavelengths of <600 nm and therefore capture most of the incoming photons