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The lighthouse's beacon remained a first-class navigational light until August 1927 when the Barnegat Lightship was anchored 8 nautical miles (15 km; 9.2 mi) off the coast. This prompted the automation [broken anchor] and replacement of the first-order lens with a gas blinker. As a result, the tower's light was reduced by over 80 percent.
In 2004, physicist and science fiction author Gregory Benford calculated that a concave rotating Fresnel lens 1000 kilometres across, yet only a few millimeters thick, floating in space at the L 1 point, would reduce the solar energy reaching the Earth by approximately 0.5% to 1%. [26] The cost of such a lens has been disputed.
The Hatch Solar Energy Center is a 5.88 MW p (5.0 MW AC) photovoltaic power station. It was built by Blattner Energy using 84 dual-axis trackers and Amonix 7700 concentrator photovoltaics (CPV) panels, each of which contains 7,560 Fresnel lenses to concentrate sunlight 500 times onto multijunction photovoltaic cells .
A first-order Fresnel lens—12 feet high, 6 feet (3.7 x 1.8 m) in diameter, and weighing about 10,000 pounds—was installed in the new lantern; the current keeper's dwelling was constructed adjacent to the tower, and the original 1796 dwelling was demolished. A steam-powered fog signal was installed in 1873, with a fog signal building in 1897.
In May 2012, the vessel became the first solar electric vehicle ever to circumnavigate the globe taking 584 days between 2010 and 2012. [3] The boat was renamed Race for Water in 2015, after the name of the foundation which then operated the vessel and was dedicated to water conservation missions and to protect the oceans from plastic pollution ...
The Swedish 1-m Solar Telescope in the Canary Islands has a slightly larger 43-in diameter (109 cm) lens but only 39-in (99 cm) clear aperture and is primarily dedicated to solar observations. [5] There are two smaller domes at Yerkes in which are currently mounted 41-inch (104 cm) and 24-inch (60 cm) reflecting telescopes. The observatory also ...