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Anonymous users2024-02-07Optical fiber cable (optical fiber cable) is mainly composed of optical fiber (thin glass filament as thin as hair) and plastic protective sleeve and plastic sheath, there is no gold, silver, copper and aluminum and other metals in the optical cable, and generally has no value. Optical cable is a communication line that a certain number of optical fibers are composed of a cable core in a certain way, covered with a sheath, and some are also covered with an outer sheath to realize optical signal transmission.
That is: the cable formed by the optical fiber (optical transmission carrier) through a certain process.
The fiber should not be refractive. He has a protective sleeve on the outside
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Anonymous users2024-02-06The operation of light in a fiber optic cable is due to the occurrence of total reflection and no refraction.
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Anonymous users2024-02-05According to the ray theory, the propagation of light in optical fibers is mainly based on the principle of total reflection. When a ray of light enters perpendicular to the end face of the ray and coincides with the axis of the fiber, the ray propagates forward along the axis.
Total reflection principle: Because the propagation speed of light in different substances is different, when light is shot from one substance to another, refraction and reflection will occur at the cross-combustion delay interface of the two substances.
The wavelength of light must be within a certain range to achieve transmission, and the wavelengths commonly used in optical fibers are 850 nm, 1320 nm and 1550 nm. According to the different transmission methods, the optical leather fiber is divided into multi-mode optical fiber and single-mode optical fiber. The diameter of a multimode fiber is 50, while the diameter of a singlemode fiber is.
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Anonymous users2024-02-04Light travels in a straight line (in a homogeneous medium), but when the light meets another medium (homogeneous medium), the direction changes, and it still travels in a straight line. Whereas, in a non-homogeneous medium, light generally travels in a curve. The propagation path of the above light can be determined by Fermat's principle.
When the brightness of the light is darker, the light from the luminaire to the illumination reference object will expand, the farther the distance, the greater the diffusion, from the initial shape to the disappearance, and when the luminous body is zero distance from the illumination reference object, the shape of the light is the real shape size of the luminous body, so the direction of light propagation is related to the brightness of the light and the distance between the light and the illumination reference object.
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Anonymous users2024-02-03Light can be reflected, light is equivalent to two parallel glass surfaces, and the light is constantly reflected between the two faces, moving forward in a "Z" shape.
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Anonymous users2024-02-02The prerequisite for light to travel in a straight line is that it is in the same homogeneous medium.
Optical transmission in optical fiber communication uses total reflection of light (not taught in junior high school).
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Anonymous users2024-02-01It walks straight, and after walking for a while, it is fully reflected and walks in a straight line in the other direction. Z-shaped.
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Although the propagation speed of light in a vacuum is the same, due to the different wavelengths and frequencies of different color light, the refractive index of different colors of light in the medium is different, the refractive index is denoted by n, the speed in the medium is set to v, and the speed in the vacuum is c, n=c v, according to which the speed of different colors of light in different media can be deduced.
Because fiber optic cables can ensure the timeliness and security of messages, sending and receiving messages quickly and the possibility of theft is also small.
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