Optic fiber communication

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In optic fibers the how do v transmitt the information? will not there be interference of light as different wavelength of light travel in core?
 

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The speed that light travels is independent of the wavelength. So the signal at any point in the cable is in the same state, or modulation, as it was at transmission.
 
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berkeman
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In optic fibers the how do v transmitt the information? will not there be interference of light as different wavelength of light travel in core?

The speed that light travels is independent of the wavelength. So the signal at any point in the cable is in the same state, or modulation, as it was at transmission.

Not quite -- dispersion can be a design issue in multi-mode fibers:

http://en.wikipedia.org/wiki/Fiber_optics

.
 
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