When viewing a scene, as in optics, photography, or even hunting, the line of sight is the straight line between the observer and the target. In astronomy, when the distance between the observer and the distant objects is large, the light of sight can often be taken as the straight line between the earth and the target. The first section of this article is about the abstract notion of scene in arts and scene as in a cultural space. ... See also list of optical topics. ... Lens and mounting of a large format camera Photography is the process of making pictures by means of the action of light. ... Hunting is, in its most general sense, the pursuit of a target. ... Possible meanings: In general, an observer is any system which receives information from an object. ... A target can signify: from ca. ... Astronomy is one of the few sciences where amateurs can still play an active role, especially in the discovery and monitoring of transient phenomena. ... A line, or straight line, is, roughly speaking, an (infinitely) thin, (infinitely) long, straight geometrical object, i. ... Earth, also known as the Earth, Terra, and (mostly in the 19th century) Tellus, is the third planet outward from the Sun. ... A target can signify: from ca. ...

Line of sight is commonly used to refer to telecommunication links that rely on a line of sight between the transmitting antenna and the receiving antenna. Such capability is necessary for high frequency microwave links that offer relatively high bandwidth communication circuits. Typical operating frequencies are in the gigahertz frequency range where the radio path is not reflected or refracted to any great extent. Occasionally this term is mis-written as "line of site". BlackBerry 7100t Telecommunication is the extension of communication over a distance. ... This page is about the radiation; for the appliance, see microwave oven. ... // Analog For analog signals, bandwidth is the width, usually measured in hertz, of a frequency band f2 − f1. ...

Typical transmission path lengths are of the order of forty miles (60 km) but the height of the antennae and intervening terrain have significant influence. Many links are now being upgraded to fibre optic cable. Fiber Optic strands An optical fiber in American English or fibre in British English is a transparent thin fiber for transmitting light. ...

Line of sight is also be necessary for optical transmission systems which can be used for short distances, between two high buildings, where a cable link might be very long.