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Blue light, a type of high-energy light, is part of the visible light spectrum. High-energy visible light (HEV light) is short-wave light in the violet/blue band from 400 to 450 nm in the visible spectrum, which has a number of purported negative biological effects, namely on circadian rhythm and retinal health (blue-light hazard), which can lead to age-related macular degeneration.
Hafren Dyfrdwy — is a utility company (water supply). Established in 1997, its headquarters is in Packsaddle, Rhostyllen, Wrexham, Wales. It was formed from the merger of Wrexham Water plc and Chester Waterworks Company, and was formerly known as Dee Valley Water. Its parent company is Severn Trent.
Oxygen is a chemical element; it has symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. Oxygen is the most abundant element in Earth's crust, and after hydrogen and helium, it ...
Portuguese Republic República Portuguesa (Portuguese) Flag Coat of arms Anthem: A Portuguesa "The Portuguese" Show globe Show map of the European Union Location of Portugal (dark green) – in Europe (green & dark grey) – in the European Union (green) Capital and largest city Lisbon 38°46′N 9°9′W / 38.767°N 9.150°W / 38.767; -9.150 Official languages Portuguese ...
Pokémon[ a] is a Japanese media franchise consisting of video games, animated series and films, a trading card game, and other related media. The franchise takes place in a shared universe in which humans co-exist with creatures known as Pokémon, a large variety of species endowed with special powers. The franchise's target audience is ...
Ancient Greece portal. Myths portal. v. t. e. In ancient Greek religion and mythology, the twelve Olympians are the major deities of the Greek pantheon, commonly considered to be Zeus, Poseidon, Hera, Demeter, Aphrodite, Athena, Artemis, Apollo, Ares, Hephaestus, Hermes, and either Hestia or Dionysus. [ 2] They were called Olympians because ...
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines. Each line indicates a particular chemical element ...
Apollo, God of Light, Eloquence, Poetry and the Fine Arts with Urania, Muse of Astronomy (1798) by Charles Meynier. Apollo[ a ] is one of the Olympian deities in classical Greek and Roman religion and Greek and Roman mythology. Apollo has been recognized as a god of archery, music and dance, truth and prophecy, healing and diseases, the Sun and ...