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Lighter Side. Politics
The first product made with Gore-Tex fabric debuted in 1976 and was a streamlined, two-person tent called The Light Dimension. [2] The tent was created by Nicolai and William H. Edwards and was marketed by Ron Zimmerman. In 1975, Gore salesman Joe Tanner introduced Early Winters to the fabric product, which at that time was still without a name.
Dawn is the time that marks the beginning of twilight before sunrise. It is recognized by the appearance of indirect sunlight being scattered in Earth's atmosphere , when the centre of the Sun 's disc has reached 18° below the observer's horizon . [ 1 ]
A Winston cone is a non-imaging light collector in the shape of an off-axis parabola of revolution [1] [2] with a reflective inner surface. It concentrates the light passing through a relatively large entrance aperture through a smaller exit aperture. [ 3 ]
Light cone coordinates can also be generalized to curved spacetime in general relativity. Sometimes calculations simplify using light cone coordinates. See Newman–Penrose formalism. Light cone coordinates are sometimes used to describe relativistic collisions, especially if the relative velocity is very close to the speed of light.
Before Dawn may refer to: Before Dawn (horse) (1979–2006), American racehorse Before Dawn: The Music of Yusef Lateef , a 1957 American jazz album featuring Yusef Lateef
In photography, the golden hour is the period of daytime shortly after sunrise or before sunset, during which daylight is redder and softer than when the sun is higher in the sky. The golden hour is also sometimes called the magic hour , especially by cinematographers and photographers .
The reason that the zone of mesopic vision exists is because the activities of neither cones nor rods is simply switched 'on' or 'off'. There are reasons to believe that the cones and the rods both operate in all luminescence conditions. [3] As a result of gradually switching from cones to rods in processing light, a number of visual effects ...