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The Sun's UV output is divided into UV-A and UV-B: solar UV-A flux is 100 times that of UV-B, but the erythema response is 1,000 times higher for UV-B. [citation needed] This exposure can increase at higher altitudes and when reflected by snow, ice, or sand. The UV-B flux is 2–4 times greater during the middle 4–6 hours of the day, and is ...
A UV index reading of 3 to 5 means moderate risk of harm from unprotected sun exposure. Stay in shade near midday when the sun is strongest. If outdoors, wear sun-protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 50+ sunscreen every 1.5 hours, even on cloudy days, and after swimming or ...
In 2009, Natural Resources Canada released a report [14] describing the possible UV exposure from several types of lamps. The report states that at 3 cm distance, the recommended daily exposure to ultraviolet radiation for skin and eye damage (if looking directly at the lamp) was attained between 50 minutes and 5 hours depending on the type of ...
Extreme ultraviolet composite image of the Sun (red: 21.1 nm, green: 19.3 nm, blue: 17.1 nm) taken by the Solar Dynamics Observatory on August 1, 2010 13.5 nm extreme ultraviolet light is used commercially for photolithography as part of the semiconductor fabrication process.
That was 1.1% below 2023 sales of 1.81 million as overall demand for electric vehicles in the U.S. and elsewhere slowed. The year-over-year global sales drop is Tesla’s first since 2011 ...
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A Dutch court convicted five men for their part in last month's violence against Israeli soccer fans in Amsterdam.
The resulting smaller floor footprint for UV coatings line is 20–32 feet (6.1–9.8 m) in total length, while running 100–800 feet (30–244 m) feet per minute is also considered desirable. The process is cleaner because no Volatile organic compound|volatile organic compounds (VOCs), or Air pollution|Hazardous Air Pollutant (HAPs) are produced.