The optical fibres have an inner core of refractive index n1 and a cladding of refractive index n2, such that

Question

The optical fibres have an inner core of refractive index n1 and a cladding of refractive index n2, such that (A)  n1=n2  (B)  n1 le n2  (C)  n1<n2  (D)  n1>n2

Tardigrade Admin · Accepted Answer

Optical fibre is made of a thin glass core (diameter 10 to 100 text μ m ) surrounded by a glass coating called cladding is protected by a jacket of plastic. The refractive index of the glass used for making core (n1≈ 1.7) is a little more than the refractive index of the glass (n2=1.5) used for making the cladding ie, n1>n2 .

Q. The optical fibres have an inner core of refractive index $n_{1}$ and a cladding of refractive index $n_{2},$ such that

$n_{1} = n_{2}$

$n_{1} \leq n_{2}$

$n_{1} < n_{2}$

$n_{1} > n_{2}$

$n_{1} \geq n_{2}$

Q. The optical fibres have an inner core of refractive index n1​ and a cladding of refractive index n2​, such that

n1​=n2​

n1​≤n2​

n1​<n2​

n1​>n2​