Radiations from the Sun are made up of a large spectrum, from radiations of shorter wavelength to longer wavelengths. The shorter wavelength of invisible sunlight is known as ultraviolet radiations. Invisible to the normal human eye, they are still visible to some insects like bumblebees. Scientists classify ultraviolet radiations into three regions: the near, the far, and the extreme ultraviolet regions. These are differentiated by their energy and the wavelength related to radiated energy.
The closest to the visible light is the near ultraviolet radiation, abbreviated as NUV. The most energetic of them is the close to the X-rays known as the extreme ultraviolet radiations, abbreviated as EUV. The least studied of them is the far ultraviolet, abbreviated as FUV, lies between near and extreme ultraviolet regions.
Sun radiates energy of various wavelength but ultraviolet radiations alone are accounted for the sunburns caused by the Sun. Most of the ultraviolet radiations are blocked by the blanket atmosphere around the Earth composed of ozone and other gases. Ultraviolet index is used to measure the radiations coming into the atmosphere and help people avoid its harmful effects. Protection from the ultraviolet exposure is encouraged. Astronomers use telescopes installed on satellites to calculate the extent of these radiations coming from the stars, galaxies, and particularly from the Sun. Near ultraviolet radiations are studied with Hubble Space Telescope form distant stars and galaxies. For over 17 years far and near UV radiations are being studied with the International Ultraviolet Explorer. Presently, extreme UV radiations are observed with the help of NASA's Extreme Ultraviolet Explorer.
Ultraviolet radiations help us explore the behavior and nature of far off stars and galaxies. Researchers are curious to explore invisible ultraviolet rays as the majority of heavenly bodies in the universe emit huge quantities of ultraviolet energy. Galaxies look different depending upon the intensities of the visible and ultraviolet wavelengths. The composition and evolution of galaxies is discovered using these comparisons in intensities.
The closest to the visible light is the near ultraviolet radiation, abbreviated as NUV. The most energetic of them is the close to the X-rays known as the extreme ultraviolet radiations, abbreviated as EUV. The least studied of them is the far ultraviolet, abbreviated as FUV, lies between near and extreme ultraviolet regions.
Sun radiates energy of various wavelength but ultraviolet radiations alone are accounted for the sunburns caused by the Sun. Most of the ultraviolet radiations are blocked by the blanket atmosphere around the Earth composed of ozone and other gases. Ultraviolet index is used to measure the radiations coming into the atmosphere and help people avoid its harmful effects. Protection from the ultraviolet exposure is encouraged. Astronomers use telescopes installed on satellites to calculate the extent of these radiations coming from the stars, galaxies, and particularly from the Sun. Near ultraviolet radiations are studied with Hubble Space Telescope form distant stars and galaxies. For over 17 years far and near UV radiations are being studied with the International Ultraviolet Explorer. Presently, extreme UV radiations are observed with the help of NASA's Extreme Ultraviolet Explorer.
Ultraviolet radiations help us explore the behavior and nature of far off stars and galaxies. Researchers are curious to explore invisible ultraviolet rays as the majority of heavenly bodies in the universe emit huge quantities of ultraviolet energy. Galaxies look different depending upon the intensities of the visible and ultraviolet wavelengths. The composition and evolution of galaxies is discovered using these comparisons in intensities.
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