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Numerical Aperture of Optical Fiber



  • Using the given apparatus, find the numerical aperture and acceptance angle of a glass-glass fiber.


  • A detector is placed at a distance 2 mm from a laser source emitting red light. Find the numerical aperture of the plastic-glass fiber used.


  • For different laser source, find the variation in numerical aperture and acceptance angle of a glasss-glass fiber with detector distance when the distance between the source and detector is 3 mm.


  • A plastic- glass fiber is used to transmitt blue light. Obtain the angle of incidence at which the light can be propagated through the fiber without any loss.


  • Compare the acceptance angle for a glass-glass fiber and a plastic-glass fiber for propagating green light without loss.



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