- #1
cainko
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Homework Statement
There is an optical fiber.A light ray enter it at i°.Total internal reflection occur at X.
What are the necessary conditions for the light ray to travel along the core of the fiber?
(I have canceled B and D already.)
A.n1>n2 and angle i should be greater than a certain value.
C.n1>n2 and angle i should be less than a certain value.
Homework Equations
sinθa/sinθg=1/n; sinc=1/n;n1/n2=v1/v2
The Attempt at a Solution
For t.i.r. θ>c
r=90°-θ
r<90°-c
But I don't understand how I can determine i is greater than or less than c(certain value) because i and r are not the same?
Thank you so much!:)
cainko
(Sorry for my bad drawing)