When launching light down an optical fiber, why is it important to exceed the critical angle?
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Expert's answer
2014-11-24T03:49:25-0500
Light pulses move easily down thefiber-optic line because of a principle known as total internal reflection. This principle of total internal reflection states that when the angle of incidence exceeds a critical value, light cannot get out of the glass; instead, the light bounces back in. When this principle is applied to the construction of the fiber-optic strand, it is possible to transmit information down fiber lines in the form of light pulses.
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