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Johnathan Fletcher

Journey into a Schwarzschild black hole - 0 views

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    "The stereo movie has been adapted to human binocular vision. The movie does not represent what you would actually see with your two eyes if you visited a real black hole. In reality, the curved spacetime would distort wavefronts of light away from spherical, confusing your binocular perception. The conflicting visual cues might make you feel queasy. But the failure of binocular vision is merely a limitation of beings who have evolved in flat spacetime. Trinocular vision would work fine."
Johnathan Fletcher

BBC News - Long-lasting all-weather night-vision material unveiled - 0 views

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    "A US-based team of scientists claims to have invented a material that releases over two weeks of night-vision light after just one minute's exposure to the sun. The University of Georgia team says the near-infrared emitting substance could offer the military "secret" illumination at nighttime."
Johnathan Fletcher

YouTube - The Known Universe by AMNH - 0 views

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    The Known Universe takes viewers from the Himalayas through our atmosphere and the inky black of space to the afterglow of the Big Bang. Every star, planet, and quasar seen in the film is possible because of the world's most complete four-dimensional map of the universe, the Digital Universe Atlas that is maintained and updated by astrophysicists at the American Museum of Natural History. The new film, created by the Museum, is part of an exhibition, Visions of the Cosmos: From the Milky Ocean to an Evolving Universe, at the Rubin Museum of Art in Manhattan through May 2010.
Johnathan Fletcher

PhET Geometric Optics - Refraction, Lens, Vision, Light, Images, Optics - 0 views

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    How does a lens form an image? See how light rays are refracted by a lens. Watch how the image changes when you adjust the focal length of the lens, move the object, move the lens, or move the screen.
Johnathan Fletcher

PhET: Free online physics, chemistry, biology, earth science and math simulations - 0 views

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    Fun, interactive, research-based simulations of physical phenomena from the PhET project at the University of Colorado.
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