光线是目前已知宇宙中传播速度最快的,在空气和真空中,光速接近每秒30万千米;但在通过某些透明介质时,比如水或者玻璃,由于折射的关系,光速会稍微减慢,当然,这种减速极其有限,这一过程根本不可能被人们感知。不过,科学家希望通过类似的效应来拦截、捕获并重新释放光,这是研制量子中继器的重要步骤,也 Light is currently known to have the fastest propagation speed in the universe, with air velocities approaching 300,000 km per second in air and vacuum, but when passing through some transparent medium, such as water or glass, the light velocity is slightly reduced due to refraction Slowly, of course, this deceleration is extremely limited and it is impossible for the process to be perceived by people. However, scientists hope to intercept, capture and re-release light with similar effects, which is an important step in the development of quantum repeaters.