Emissivity of Different Minerals: Example

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Presentation transcript:

Emissivity of Different Minerals: Example http://tes.asu.edu/MARS_SURVEYOR/MGSTES/mixed_spec.gif

Emissivity of Water Vapor, Normal Incidence Note: Strong spectral dependence of emissivity due to rotational and vibrational absorption bands.

Normal Emissivity of a Liquid Water Layer Notes: Only need about 1mm thickness to be opaque. Strong spectral dependence of gaseous phase washed out.

Angle Dependence of Emissivity Message: Even something so strongly absorbing as water (IR) has high reflectivity (low emissivity) at grazing angles.