- #1
mmanu
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Homework Statement
I'm taking an introduction course in optics and I came across this exercise which I can't find how to solve:
"Two light pulses with different wave lengths 500 and 600 nm is sent into a 1 km long fiber.
n(610 nm) = 1.399, n(600 nm) = 1.400, n(510 nm) = 1.448, n(500) = 1.45.
When will the two pulses come out of the fiber relative to each other?"
(Hopefully the translation is OK..)
Homework Equations
I suspect that I might need to use group velocity (http://en.wikipedia.org/wiki/Group_velocity), but this has not been taught in the class so far, so perhaps there is an easier way to tackle the problem??
The Attempt at a Solution
Nothing that has ended up embarrassingly wrong... :/
Thanks in advance!
BR
/Manu