The UV Index measures the ultraviolet radiation coming from the sun. There are three primary types of UV radiation: ...

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Before 2025 ends, the last solar eclipse of the year will take place today (September 21, 2025). The solar eclipse is one of nature’s most stunning e ...

Before 2025 ends, the last solar eclipse of the year will take place today (September 21, 2025). The solar eclipse is one of ...

Getting morning sun can actually improve your sleep, and let you wake up feeling rested and ready to face the day.

Compared to its predecessor, the Ricoh GR III, there's no one standout spec that makes the GR IV the obvious winner. Rather, ...

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The Ricoh GR IV is a photographer's compact built around a 26MP APS-C sensor with a fixed 28mm equiv. F2.8 lens. It's the fourth entry in the GR series (though that was preceded by the long-running GR ...

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The visible light was provided by a Xe lamp with an AM 1.5 simulated filter. (E) Schematic diagram for the separation and transfer mechanism of photogenerated electron–hole pairs over NFDA/TiO 2 /Si. ...