Recent content by cainko

as i increase when r increase, to make r< rc , i should be<ic too?

Oh, so r<90°-c ---> i is also<90°-c ?? so i is less than certain value?

decreases?

I am so sorry!:( I draw the figure wrongly! for t.i.r. light must travel from low speed to high sped,for light ray:larger n --> smaller n ==>n1>n2 θ will increase when angle i increased?? sini/sinr = n ; sini increase-->sinr decrease==>θ=90°-r, r decrease θ increase? thx so much!

MC is multiple choice question:)

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...