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An optical fibre is made with core RI=1.55 and cladding RI=1.51. Calculate NA

written 9.2 years ago by teamques10 ★ 70k

•   modified 9.2 years ago

Mumbai university > FE > SEM 2 > Applied Physics II

Marks: 3M

Year: May 2013

advanced engineering physics

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written 9.2 years ago by teamques10 ★ 70k

Given:

$n_1 = 1.55$

$n_2 = 1.51$

To find : NA

Solution :

$NA = \sqrt{n_1^2 - n_2^2}$

$NA = \sqrt{(1.55)^2 - (1.51)^2}$

$NA = 0.3499$

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