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  1. 紫外線除塵蟎機 - 購物搜尋結果

    更多 紫外線除塵蟎機 相關商品

  2. en.wikipedia.org › wiki › UltravioletUltraviolet - Wikipedia

    Ultraviolet ( UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs, Cherenkov radiation, and ...

  3. en.wikipedia.org › wiki › Solar_SystemSolar System - Wikipedia

    The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. It was formed 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc.The Sun is an ordinary main sequence star that maintains a balanced equilibrium by the fusion of hydrogen into helium at its core, releasing this energy from its outer ...

    • 4.568 billion years

  4. en.wikipedia.org › wiki › Light-emitting_diodeLight-emitting diode - Wikipedia

    Main article: Light-emitting diode physics. In a light-emitting diode, the recombination of electrons and electron holes in a semiconductor produces light (be it infrared, visible or UV), a process called " electroluminescence ". The wavelength of the light depends on the energy band gap of the semiconductors used.

  5. en.wikipedia.org › wiki › AyahuascaAyahuasca - Wikipedia

    Ayahuasca [note 1] is a South American psychoactive brew, traditionally used by Indigenous cultures and folk healers in the Amazon and Orinoco basins for spiritual ceremonies, divination, and healing a variety of psychosomatic complaints. Originally restricted to areas of Peru, Brazil, Colombia and Ecuador, in the middle of the 20th century it ...