APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY Previous Years Question Paper & Answer
University : APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Course : B.Tech
Semester : SEMESTER 1
Subject : ENGINEERING PHYSICSA
Year : 2020
Term : DECEMBER
Scheme : 2019 Full Time
Course Code : PHT 100
Page:3
PDF Text (Beta):
00000111 100121801 A
20 a) Define numerical aperture and acceptance angle of an optical fibre and derive
the expression for numerical aperture of a step index fibre with a neat
diagram.
b) Calculate the numerical aperture and acceptance angle of an optical fibre with
a core of refractive index 1.62 and a cladding of refractive index 1.52.
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