Need help finding a gas or liquid that absorbs IR and allows visible.

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SUMMARY

The discussion focuses on identifying gases or liquids that effectively absorb infrared (IR) radiation in the range of 700–1400 nm while allowing visible light (380–750 nm) to pass through. Water is noted as a partial absorber of IR, contributing to the blue appearance of oceans. The conversation also touches on the greenhouse gas effect, specifically mentioning water vapor, CO2, and ozone as relevant factors. Participants are seeking optimal solutions for materials that meet these specific optical properties.

PREREQUISITES
  • Understanding of infrared spectroscopy and its wavelength ranges.
  • Knowledge of the greenhouse gas effect and its components.
  • Familiarity with the optical properties of water and other potential absorbers.
  • Basic principles of light transmission and absorption in different media.
NEXT STEPS
  • Research the optical properties of water vapor and its IR absorption characteristics.
  • Investigate the absorption spectra of common greenhouse gases like CO2 and ozone.
  • Explore materials such as specific organic solvents that may meet the criteria.
  • Examine the use of filters or coatings that selectively allow visible light while blocking IR.
USEFUL FOR

Researchers in optics, environmental scientists studying greenhouse gases, and engineers working on thermal management solutions would benefit from this discussion.

hemi426
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I am trying to find a gas or liquid that likes to absorb the lower portion of the IR sperctrum (700–1400nm) but let's visible light pass (380-750nm). It can be a liquid or gas because it is going in a sealed container.

I know that water absorbs infrared to a certain extent and that's why the oceans appear blue for the most part. I have also been looking into the greenhouse gas effect and how it helps to trap the heat using water vapor, CO2 and CO3/ozone.
What are the best absorbers of IR that transmit visible light?

Thanks in adavnce
:smile:
 
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I would also be interested in this if anyone knows.
 

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