Glossary of Solar Radiation Resource Terms

Other relevant glossaries


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Ultraviolet Radiation - 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.


Uncertainty - 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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