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Chemistry LibreTexts

Percent Transmittance

[ "article:topic", "authorname:ggunawardena" ]
  • Page ID
    40860
  • The percent transmission, y axis of an infrared spectrum, is defined as follows.

     

     

    If the sample absorbs no light, I = Iο; percent transmittance = 100%.  If the sample absorbs the light completely, I = 0; percent transmittance = 0.  Thus, the greater the amount of light absorbed by the sample, the smaller the percent transmittance.