An optic fiber is made of clear plastic withindex of refraction of 1.50. For wha

Question

   An optic fiber is made of clear plastic withindex of refraction of 1.50. For what angle of incidence will lightremain within the plastic "guide"? A) > 41.8 degrees B) > 21.1 degrees C) > 38.3 degrees D) > 40.3 degrees E) > 23.4 degrees Why?    An optic fiber is made of clear plastic withindex of refraction of 1.50. For what angle of incidence will lightremain within the plastic "guide"? A) > 41.8 degrees B) > 21.1 degrees C) > 38.3 degrees D) > 40.3 degrees E) > 23.4 degrees Why?

Explanation / Answer

   to get the total internal reflection theangle of incidence must be greater than the critical angle(c) so that the relation    between the critical angle and index ofrefraction () is given by     = 1 / sinc    solve for c

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