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SRML Glossary "U" Special thanks to NREL We'd like to thank the National Renewable Energy Laboratory for making available to us their glossary, which is the basis of ours. We've edited and reformatted it, and linked it to our Web pages, and we'll continue to add our own specialized terms, illustrations, and examples. Please note that the Solar Radiation Monitoring Laboratory takes full responsibility for any inaccuracies that may occur. Links to other glossary sections: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| The range
of radiation just beyond the violet in the visible spectrum (at about 4,000
Angstroms or 400 nanometers(nm)) to the x-ray region (at about 40 Angstroms
or 4 nm). Solar researchers tend to define the energetic region of the electromagnetic
spectrum from 1 - 300 nm as the ultraviolet region. UV-A is in the 320-400
nm range, and UV-B is in the 280-320 nm range.
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| The expression
of the amount of doubt that remains after a result is obtained. Although
uncertainty may be subjective and without foundation ("We are 80% certain
that nuclear fusion will be a power source in the 21st century"), many uncertainties
are determined by statistical procedures ("Sampling polls indicate that
63% agree, with a possible 3% uncertainty") or measurement
uncertainty (e.g., 3.204 ± 0.005 °C).
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Links to other glossary sections: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z © 2022, UO Solar Radiation Monitoring Laboratory. Last revised: April 7, 2022.
Home page URL: solardata.uoregon.edu |