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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.
Van Halen modified the Frankenstrat several times. This photo shows the guitar in its final state, with red-over-white-over-black paint job. The top two pickups have been replaced with company electronics: the center one with a selector switch and the upper one with a red single-coil made in 1931, pickup.
Humans are sensitive to light with a short wavelength. Specifically, melanopsin is sensitive to blue light with a wavelength of approximately 480 nm. [19] The effect this wavelength of light has on melanopsin leads to physiological responses such as the suppression of melatonin production, increased alertness, and alterations to the circadian ...
Blue light is absorbed by the structural proteins, enzymes, and protein metabolites found in the lens. [9] The absorption of blue light creates yellow pigments in the lens's protein. The lens progressively darkens and turns yellow. [9] Blue light is absorbed by the lens, preventing blue light from reaching the retina at the back of the eye. [12]
Polysomnography (PSG) is a multi-parameter type of sleep study [1] and a diagnostic tool in sleep medicine.The test result is called a polysomnogram, also abbreviated PSG.The name is derived from Greek and Latin roots: the Greek πολύς (polus for "many, much", indicating many channels), the Latin somnus ("sleep"), and the Greek γράφειν (graphein, "to write").
Sleep studies have been imperative for the empirical research of sleep psychology. The area of sleep psychology evaluates the physiological, and behavioral factors of normal sleep and sleep disorders along with the neuroscience and brain-wave activity associated with sleep, as well as the study of circadian rhythms. [12]
A 2014 study found that depriving mice of sleep increased cancer growth and dampened the immune system's ability to control cancers. [122] The effect of sleep duration on somatic growth is not completely known. One study recorded growth, height, and weight, as correlated to parent-reported time in bed in 305 children over a period of nine years ...
"Eruption" starts with a short accompanied intro with Alex Van Halen on drums and Michael Anthony on bass.The highlight of the solo is the use of two-handed tapping. "Eruption" was played on the Frankenstrat, with an MXR Phase 90, an Echoplex, a Univox echo unit and a 1968 Marshall 1959 Super Lead tube amp.