MedCram Episode 137. See Infrared Light with Your Own Eyes and Testing Situations
Sep 30, 2025
Explore the fascinating world of infrared light! Discover how a simple filter can make near-infrared visible, and learn the science behind it. Roger tests infrared penetration through clothing and windows, revealing surprising results. He discusses health benefits linked to green spaces and the impact of different indoor lighting types on well-being. With practical advice on measuring and optimizing infrared exposure, you'll be inspired to embrace the outdoors and enhance your lighting at home.
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Use A Camera Film To See Infrared
- Put an infrared-converting film over your smartphone camera lens to visualize near-infrared as visible red.
- The film is inexpensive (~$30) and sticks directly onto the lens for immediate use.
How The Film Converts Infrared Light
- The film uses rare-earth materials to shift longer infrared wavelengths into shorter visible red via anti-Stokes scattering.
- That process preserves other colors while revealing near-infrared as red to your camera.
Greenery Reflects Infrared Strongly
- Plant leaves strongly reflect near-infrared, making greenery appear intensely red through the filter.
- The filter doesn't alter visible colors much, it only shifts infrared into red so you can see it.