Near-infrared radiation is blocked by water vapor because water absorbs in the near-infrared spectrum, specifically around 940 nanometers, which limits NIR penetration on cloudy or humid days and prevents outdoor sunlight from delivering full NIR benefits.
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Unidentified Speaker — Photobiomodulation Devices and Research (including Long COV… [isz2IQs_EPg]Evidence Quote
“near infrared radiation is blocked by water vapor because water absorbs in the near infrared Spectrum specifically at actually around 940 NM as well as other areas”
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Photobiomodulation Devices and Research (including Long COVID)— MedCram - Medical Lectures Explained CLEARLYCreated: 8/10/2026, 10:04:37 PM
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