一道有关光学的计算题The refractive index of core and cladding for a 1km length single mode fiber is 1.47 and 1.45 respectively.The time taken for the light to travel in this fiber is
问题描述：
一道有关光学的计算题
The refractive index of core and cladding for a 1km length single mode fiber is 1.47 and 1.45 respectively.The time taken for the light to travel in this fiber is
答
alright,i'm a little drunk now,but i can still answer your question:internal total reflection condition:n1sin p=n2 sin pi/2 ===> sin p=0.98639455782312925170068027210884total time = (L/sin p) /(c/n2) ...