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Line of sight (LoS) propagation from an antenna. Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves can only travel in a direct visual path from the source to the receiver without obstacles. [1] Electromagnetic transmission includes light emissions traveling in a straight line.
The term "line" typically presumes that the light by which the observed object is seen travels as a straight ray, which is sometimes not the case as light can take a curved/angulated path when reflected from a mirror, [5] refracted by a lens or density changes in the traversed media, or deflected by a gravitational field. Fields of study ...
iPhone 13 / 13 mini iPhone SE (3rd gen) A14 Bionic 6 GB iPhone 12 Pro / 12 Pro Max 4 GB iPhone 12 / 12 mini A13 Bionic iPhone 11 iPhone 11 Pro / 11 Pro Max 3 GB iPhone SE (2nd gen) A12 Bionic 4 GB iPhone XS / XS Max 3 GB iPhone XR: A11 Bionic iPhone X / 8 Plus iOS 16.7.10: 2 GB iPhone 8: A10 Fusion 3 GB LPDDR4 1600 MHz iPhone 7 Plus iOS 15.8.3 ...
The iPhone 11 includes a dual-lens 12 MP rear camera array. It has one ƒ/2.4 ultra-wide-angle lens with a 120° field of view and 2× optical zoom out, and one ƒ/1.8 wide-angle lens. The iPhone 11 supports 4K video at up to 60 fps and 1080p slow motion at up to 240 fps. [2]
The propagation constant of the guided wave is complex, in general. For a lossless case, the propagation constant might be found to take on either real or imaginary values, depending on the chosen solution of the eigenvalue equation and on the angular frequency .
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Apple on Tuesday unveiled a new iPhone 15 Pro with a titanium case and faster chip that enables better cameras and mobile gaming, moves designed to respond to a global smartphone slump. The new ...
This improves the overlap between the focused laser beam and the photorefractive material, thus reducing power needed from the laser. [11] When transparent material is exposed to an unfocused laser beam of sufficient brightness to initiate photorefractive effect, the waveguides may start forming on their own as a result of an accumulated self ...