In optical fibres, the refractive index of the core is
A. greater than that of the cladding
B. equal to that of the cladding
C. smaller than that of the cladding
D. independent of that of the cladding
Answer:A
In optical fibres, the refractive index of the core is
A. greater than that of the cladding B. equal to that of the cladding C. smaller than that of the cladding D. independent of that of the cladding