Recent content by kelvin_ng

No need to sorry.. ^^ Is very nice that u guyz is tryin to help.

lolx, i know what to do now. I just get the answer. Just by using trigonometri. 10^-4 / sin 15 to find the hipotenus.

but then i get the angle of refraction is 37.14 degree. then what else i could do to get L = 3.9 x 10^{-4} m ?

is it using n = sine i/sine r or n = 1 / sine c? and is it i = 90degree - 15degree = 75degree? i don't know actually what the question mean by. Can someone help me?

what is the solution to this question? I just can't get to the answer.

the answer given is L = 3.9 x 10^{-4} m.

Question: A ray of light enters a light fiber at an angle of 15degree with the long axis of the fiber. Calculate the distance the light ray travels between succesive reflections off the sides of the fiber has an index of refraction 1.6 and is 10^{-4}mm in diameter.