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Glossary of Solar Radiation Resource Terms |
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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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