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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.
The Hawaii Medical Service Association (HMSA) is a member of the Blue Cross Blue Shield Association, an association of independent medical insurance providers. A nonprofit, mutual benefit association founded in 1938, HMSA covers more than half of the state’s population. HMSA’s headquarters are located at the HMSA Center, 818 Keeaumoku ...
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.
Plans for the liners Avila and Avelona, built in 1926–27. Blue Star Line was formed as an initiative by the Vestey Brothers, a Liverpool -based butchers company, who had founded the Union Cold Storage Company to take advantage of refrigeration practices. They developed a large importation business, shipping frozen meat from South America to ...
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 ...
Blue Bloods. episodes. Blue Bloods is an American police procedural television series created by Robin Green and Mitchell Burgess. It premiered on September 24, 2010, on CBS. [ 1] The series centers on the Reagans, a family of police officers in New York City. Frank Reagan ( Tom Selleck) is the police commissioner with three grown children ...
1 January – The warmest New Year's Day on record is reported, with temperatures of 16.2 °C (61.2 °F) in St James's Park, Central London. [2]3 January – COVID-19 in the UK: A critical incident is declared at several hospitals in Lincolnshire after the increased spread of COVID-19 causes "extreme and unprecedented" staff shortages.
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 ...