solar spectrum

The Sun's spectrum extends from gamma-ray to radio wavelengths. It has an immense range in intensity, peaking at visible wavelengths. Although the central part of the curve varies little with solar activity, the long- and short-wavelength sections can be very considerably affected. The radiation intensity at visible and infrared wavelengths compares with that of a black body at a temperature of about 6000 K; the maximum intensity occurs at wavelengths of about 460 nm. This is the continuous spectrum of the photosphere in which absorption lines – Fraunhofer lines – appear. At the shortest and longest wavelengths, the solar spectrum corresponds to the radiation curve of a black body at about a million kelvin, which is representative of the temperatures of the corona and of solar flares. At ultraviolet and soft X-ray wavelengths the spectrum does not agree with either of these black-body curves. See also flash spectrum.

solar spectrum

[′sō·lər ′spek·trəm] (astrophysics) The spectrum of the sun's electromagnetic radiation extending over the whole electromagnetic spectrum, from wavelengths of 10^-9 centimeter to 30 kilometers.

solar spectrum

The bandwidth of radiant energy—from long wave to short wave. It consists of radio waves, microwaves, visible light (red and violet), ultraviolet rays, X rays, and gamma rays. See electromagnetic spectrum.

solar therapy

so·lar ther·a·py

treatment of disease by exposure to sunlight. Synonym(s): solar treatment

he·li·o·ther·a·py

(hē'lē-ō-thār'ă-pē) Use of sunlight (and more generally) light from any source to provide palliation of disease; usually for dermatologic disorders, but sometimes used in seasonal affective disorder (q.v.).
Synonym(s): solar therapy.

solar therapy

Treatment with the sun's rays. Synonym: heliotherapy

单词	solar therapy
释义	DictionarySeeheliotherapy solar spectrum solar spectrum The Sun's spectrum extends from gamma-ray to radio wavelengths. It has an immense range in intensity, peaking at visible wavelengths. Although the central part of the curve varies little with solar activity, the long- and short-wavelength sections can be very considerably affected. The radiation intensity at visible and infrared wavelengths compares with that of a black body at a temperature of about 6000 K; the maximum intensity occurs at wavelengths of about 460 nm. This is the continuous spectrum of the photosphere in which absorption lines – Fraunhofer lines – appear. At the shortest and longest wavelengths, the solar spectrum corresponds to the radiation curve of a black body at about a million kelvin, which is representative of the temperatures of the corona and of solar flares. At ultraviolet and soft X-ray wavelengths the spectrum does not agree with either of these black-body curves. See also flash spectrum. solar spectrum [′sō·lər ′spek·trəm] (astrophysics) The spectrum of the sun's electromagnetic radiation extending over the whole electromagnetic spectrum, from wavelengths of 10^-9 centimeter to 30 kilometers. solar spectrum The bandwidth of radiant energy—from long wave to short wave. It consists of radio waves, microwaves, visible light (red and violet), ultraviolet rays, X rays, and gamma rays. See electromagnetic spectrum. solar therapy so·lar ther·a·py treatment of disease by exposure to sunlight. Synonym(s): solar treatment he·li·o·ther·a·py (hē'lē-ō-thār'ă-pē) Use of sunlight (and more generally) light from any source to provide palliation of disease; usually for dermatologic disorders, but sometimes used in seasonal affective disorder (q.v.). Synonym(s): solar therapy. solar therapy Treatment with the sun's rays. Synonym: heliotherapy
随便看	consumer classes consumer coalition for health care consumer code for home builders consumer codes approval scheme consumer communications and networking conference consumer communications and networking symposium, israel consumer communications for england consumer confidence consumer confidence index consumer confidence indexes consumer confidence indices consumer confidence report consumer confidence survey consumer consortium on assisted living consumer contract consumer co-operative institute of japan consumer co-op international consumer council for water consumer council of hong kong consumer council of zimbabwe consumer councils consumer counseling centers of america, inc. consumer credit consumer credit act consumer credit act 1974