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It emits more blue light than traditional incandescent bulbs, potentially impacting the quality of sleep and eye health if used excessively at night. [2] [8] A person using a smartphone at night. Blue light is emitted by digital screens such as computers, tablets, smartphones, and televisions, which can lead to extended exposure in modern lives ...
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.
[10] [11] Cathode rays in air produce this blue glow. [12] Electrical discharge in air is the cause of blue light emitted by electric sparks, lightning, and corona discharges (e.g. St. Elmo's fire). Auroras, the sometimes observable blue-violet hues emitted by nitrogen at lower altitudes.
J. Ann Selzer's once-respected poll showed that Kamala Harris was leading in Iowa — only for Trump to win the state by more than 13 percentage points on Election Day.
Lockley et al. in 2003 [19] showed that 460 nm (blue) wavelengths of light suppress melatonin twice as much as 555 nm (green) light, the peak sensitivity of the photopic visual system. In work by Zaidi, Lockley and co-authors using a rodless, coneless human, it was found that a very intense 481 nm stimulus led to some conscious light perception ...
From June 2009 to December 2012, if you bought shares in companies when Susan C. Schwab joined the board, and sold them when she left, you would have a 92.7 percent return on your investment, compared to a 51.3 percent return from the S&P 500.
Emma Hayes, head coach of the U.S. women's national soccer team, is returning to her hometown as her team takes a trip across the pond for an international friendly.. The USWNT is set to face off ...
OMG--just look at him! This long-haired Dachshund is as fashionable as can be in his work vest, but clearly, he has no time to be fawned over. He may be a small dog, but he means business! Related ...