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The device uses two hyperbolic mirrors (in contrast to Wells's Heat-Ray, which uses a parabolic mirror) to concentrate light rays in a parallel beam. Larger "hyperboloids" can destroy military ships on the horizon, and those of less power can only injure people and cut electric cables on walls of rooms.
Parabolic reflectors are popular for use in creating optical illusions. These consist of two opposing parabolic mirrors, with an opening in the center of the top mirror. When an object is placed on the bottom mirror, the mirrors create a real image, which is a virtually identical copy of the original that appears in the opening. The quality of ...
Pairs of large parabolic acoustic mirrors which function as "whisper galleries" are displayed in science museums to demonstrate sound focusing. Between the World Wars , before the invention of radar , parabolic sound mirrors were used experimentally as early-warning devices by military air defence forces to detect incoming enemy aircraft by ...
A convex secondary mirror is placed just to the side of the light entering the telescope, and positioned afocally so as to send parallel light on to the tertiary. The concave tertiary mirror is positioned exactly twice as far to the side of the entering beam as was the convex secondary, and its own radius of curvature distant from the secondary.
The Looking Glass, or Voyage of the Space Bubble, [citation needed] series is a military novel series created by author John Ringo and centering on the creation of trans-space portals known as "looking glasses" (due to their mirror-like appearance) and the effect their discovery and the discovery of things via the portals have on life on Earth and off it. [1]
By using two parabolic cylindric mirrors and one plane mirror, the image of the background is directed around an object, making the object itself invisible - at least from two sides. Invisibility is the state of an object that cannot be seen. An object in this state is said to be invisible (literally, "not visible").
Newtonian telescope design. A Newtonian telescope is composed of a primary mirror or objective, usually parabolic in shape, and a smaller flat secondary mirror.The primary mirror makes it possible to collect light from the pointed region of the sky, while the secondary mirror redirects the light out of the optical axis at a right angle so it can be viewed with an eyepiece.
The multiverse is a series of parallel universes in many of the science fiction and fantasy novels and short stories written by Michael Moorcock [1] [2] [3] [4] (many ...