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The hypothetical particles tachyons, defined through being faster than light, have inspired many occurrences in fiction. [1] [2] In general, tachyons are a standby mechanism upon which many science fiction authors rely to establish faster-than-light communication, with or without reference to causality issues, [3] [4] as well as a means to achieve faster-than-light travel. [4]
A raygun is a science-fiction directed-energy weapon usually with destructive effect. [1] They have various names: ray gun, death ray, beam gun, blaster, laser gun, laser pistol, phaser, zap gun, etc. In most stories a raygun emits a ray usually lethal if it hits a human target, often destructive if it hits mechanical objects, with properties ...
A pencil-beam radar A moving or sweeping pencil-beam radar. In optics, a pencil or pencil of rays, also known as a pencil beam or narrow beam, is a geometric construct (pencil of half-lines) used to describe a beam or portion of a beam of electromagnetic radiation or charged particles, typically in the form of a cone or cylinder.
A front cover of Imagination, a science fiction magazine in 1956. A science fiction magazine is a publication that offers primarily science fiction, either in a hard-copy periodical format or on the Internet. Science fiction magazines traditionally featured speculative fiction in short story, novelette, novella or (usually serialized) novel ...
Beamforming or spatial filtering is a signal processing technique used in sensor arrays for directional signal transmission or reception. [1] This is achieved by combining elements in an antenna array in such a way that signals at particular angles experience constructive interference while others experience destructive interference.
American horror and science fiction magazine. Online Asimov's Science Fiction: 1977 United States Penny Publications, LLC American magazine which publishes science fiction and fantasy and perpetuates the name of Isaac Asimov. Printed Clarkesworld Magazine: 2006 United States Wyrm Publishing American magazine which publishes science fiction ...
For a few days in October 2023, the capital of the science fiction world was Chengdu, China. Fans traveled from around the world as Worldcon, sci-fi ’s biggest annual event, was held in the ...
The resolution of any radar depends on the width of the beam and the range to the target. For example; a radar with 1 degree beam width and a target at 120 km (75 mi) range will show the target as 2 km (1.2 mi) wide. To produce a 1-degree beam at the most common frequencies, an antenna 1.5 kilometres (0.93 miles) wide is required.