High Uv Absorbance Rocks And Sand

Evaluating properties of Arabian desert sands for use in solar thermal ...

Sand , however, has a low capacity for absorbing direct solar radiation [12, 17]. Spectral absorbance of carbonate-containing sands was found to decrease for all wavelengths when heat treated [11]. On the other hand, the spectral absorbance of red sands with thermally stable impurities gets enhanced after heat treatment [15].

Sands types with relatively high reflectance presented notably low temperatures, highlighting the role of color in modulating the sand temperature under solar radiation.

USGS High Resolution Spectral Library

The USGS Spectral Library contains reflectance spectra, including samples of minerals, rocks , soils, physically constructed as well as mathematically computed mixtures, plants, vegetation communities, microorganisms, and man-made materials. The samples and spectra collected were assembled for the purpose of using spectral features for the remote detection of these and similar materials. The ...

Some types of radiation, including ultraviolet ( UV ) radiation, can be damaging to organisms and to organic molecules which could potentially be used as evidence of life. For this reason it is important to understand how rocks and minerals can provide protection against these types of radiation. In this study we prepared pellets of varying thickness made of different types of rocks and minerals ...