搜尋結果
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 ...
Fourier-transform infrared spectroscopy ( FTIR) [1] is a technique used to obtain an infrared spectrum of absorption or emission of a solid, liquid, or gas. An FTIR spectrometer simultaneously collects high-resolution spectral data over a wide spectral range. This confers a significant advantage over a dispersive spectrometer, which measures ...
The Castle of Rocca Calascio is a mountaintop fortress or rocca in the municipality of Calascio, in the Province of L'Aquila, Abruzzo, Italy. At an elevation of around 1,460 metres (4,790 ft), the castle is the highest fortress in the Apennines. Built of stone and masonry exclusively for military purposes and intended only to accommodate troops ...
Incandescent light bulb. A 230-volt incandescent light bulb with a medium-sized E27 (Edison 27 mm) male screw base. The filament is visible as the mostly horizontal line between the vertical supply wires. A scanning electron microscope image of the tungsten filament of an incandescent light bulb. Elaborate light in Denver, Colorado.
Natural color X-ray photogram of a wine scene. Note the edges of hollow cylinders as compared to the solid candle. William Coolidge explains medical imaging and X-rays. X-rays (or much less commonly, X-radiation) are a form of high-energy electromagnetic radiation. In many languages, it is referred to as Röntgen radiation, after the German ...
September 4, 2013. ( 2013-09-04) –. present. It's Always Sunny in Philadelphia is an American sitcom created by Rob McElhenney and developed with Glenn Howerton for FX. It premiered on August 4, 2005, and was moved to FXX beginning with the ninth season in 2013. It stars Charlie Day, Howerton, McElhenney, Kaitlin Olson, and Danny DeVito.
Catherine, Princess of Wales (born Catherine Elizabeth Middleton;[a] 9 January 1982), is a member of the British royal family. She is married to William, Prince of Wales, heir apparent to the British throne. Born in Reading, Catherine grew up in Bucklebury, Berkshire. She was educated at St Andrew's School and Marlborough College before ...
