Question

The Refractive index of core and cladding are 1.563 and 1.498 respectively, and then Numerical Aperture (NA) is

Answer 1

Explanation:

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Answer 2

Answer:

The numerical aperture is 0.446

Explanation:

Here we have been given that the refractive index of the core is 1.563 and the respective refractive index of the cladding is 1.498

To calculate the Numerical Aperture (NA) we have:

Numerical Aperture (N.A) = $\sqrt{n_{1}^{2} - n_{2}^{2} }$

Refractive index of the core = $n_{1} = 1.563$

Refractive index of the cladding = $n_{2}$ $= 1.498$

∴ N.A = $\sqrt{(1.563)^{2} - (1.498)^{2} }$

⇒ N.A = $\sqrt{2.443 - 2.244 }$

⇒ N.A = $\sqrt{0.199}$

⇒ N.A = 0.446

Therefore the numerical aperture is found to be 0.446