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The refractive index of the core of an optical fibre is greater than that of cladding because:

3750Medium DSSSB TGT Computer Science 0 replies 2 views
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The refractive index of the core of an optical fibre is greater than that of cladding because:

  • Athe light gets reflected at the entrance end of the optical fibre
  • Bthe light gets totally internally reflected into the core
  • Cthe light gets restricted at the entrance end of the optical fibre
  • Dthe light gets refracted into cladding
Correct answer: B

Explanation

Light travelling in the core is totally internally reflected at the core–cladding boundary because the core has a higher refractive index than the cladding.
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