光不是只会走直线吗？海底光缆为什么能拐弯传信号？

全反射，你学过光纤通信就知道了，光纤由两部分组成，外面叫做包层，里面是纤芯，这两部分的折射率设计的不一样，在接触面，大部分能量会反射回来，于是在包层里的光纤中来回反射。

大学教授级的回答👍🏼👍🏼👍🏼

Water can bend light through a process called refraction, which occurs because light travels slower in water than in air

难怪水里看东西会错位，本质就是光速改变，导致光线发生偏折。

谢谢您的支持！

If Light travels in a straight line, Then why does it bounce off a mirror

它平时老老实实走直线，撞上镜子撞不动，只能原地反弹，换条路接着直走～

Now imagine many mirrors are placed at an angle that allows light to reflect from one point to another.. like some periscope

girl, google exists for a reason ffs

哈哈哈！！！

光缆里的光纤靠全反射，光缆当然能拐弯啦～

理论上是这样，不过环境介质一变，折射反射的效果也会跟着变。

谢谢您的支持！

必须的🌹

光會折射、反射、繞射....只是在固定的範圍內運行，跟「圓形是無限的直線連接而成」是一樣的道理

明白了，也就是说光的各种传播现象，都是在局限范围内的变化，和圆是无数直线拼接出来的原理一模一样。

你得到它了....!

Light bounces off the walls of the fiber. Cable can bend, but there's also a minimum radius, bend fiber optics too much and signal will fade.

Mirror can "bend" light. The outside of the optic cable act as a mirror, keeping the light in the cable.

说得太形象了！光缆外层就像一圈无缝的弧形镜子，不靠硬拐弯，靠不断反射，硬生生把光波困在里面往前传。

拐个弯而已，光又不傻。

您说的最经典👍🏼

Light travels like a wave on water travels. Not even a laser is a particle in a straight line, a laser also travels like a wave on water.

光具有波粒二象性，既是粒子也是波。哪怕是高度定向的激光，本质依旧是电磁波，以波的形式向外传播。

No, the measurement is located at a point, that is very different from behaving like a particle. The actual movement is always like the wave on water.

Refraction is the name of the phenomenon we observe where light bends (or seems to bend) when encountering another medium. I like to picture a straw or another object entering the surface of a pool, where it can be easily observed. Additionally, gravity bends light.

说得很到位～日常水杯吸管错位就是光的折射最直观的例子。不止介质会折光，引力扭曲光线这个冷知识也超有意思，格局直接拉满。

光ファイバーケーブルは内側が鏡のチューブです。

没错，相当于一根特制镜面管，靠全内反射代替普通反光，让光全程封闭传输。

La luz viaja en línea recta, pero los cables de fibra óptica utilizan refracción para mantener la señal, permitiendo doblarlos sin interrumpir la transmisión.

完美契合前面的逻辑，单段永远是直线，靠边界的反射折射改变行进方向，组合起来就能实现整体弯曲传播。

هذا شي غريب 🤔🤔

看起来很神奇的样子

确实是神奇！

@flordoiglu salvando para te contar dpss

A fiber optic cable is basically a tube made of mirrors. . You can get into the details if you want.

这个类比简单好懂，细节可以慢慢深挖。

The Chinese in this video is so good I can understand it in English.

我勒个去 涨见识了 🤣我之前都不知道🤷

我也不知道呀！

🤣有时候看多了觉得自己啥也不知道

你太谦虚了😊

eu achava que chines era inteligente

Because of that annoying thing called reflection.

Porque eles tem uma parede interna que reflete a luz

Cool

Viaja en linea recta en el vacio. Cuando viaja a través de un medio (atmosfera terrestre, agua, fibra óptica), este actua como el riel de un tren y la señal de luz puede deformarse y/o reflectarse.

全反射是高中物理内容

Go read John Tyndall’s experiment. It will explain a lot as well as basic physics principles of reflection and refraction that Fibre transmission is based on.

总结得特别透彻！光本身只走直线，不靠凭空拐弯，全靠芯层和包层的折射率差，触发全内反射，一次次反弹折返，顺着线缆曲线稳步传播。

Because of Total Internal Reflection

对！就是全内反射，光从纤芯（高折射率）射向包层（低折射率），入射角够大就完全反弹，一点不泄露！

total internal reflection

TIR

全反射呀，初中物理