Engineering Physics 2
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See all →- Calculate the V number of an optical fibre having numerical aperture 0.25 NA = 0.25 Core diameter = 20 μm λ0= 1.55 μm Formula: V = ᴨd / λ0 ×NA V = 3.14×20×10⁻⁶ /1.55 ×10⁻⁶ ×0.25 V = 10.13 1
- What is pumping in LASER? Give the types of pumping. The process of raising large number of atoms from lower energy to a higher energy level is called pumping. Types of pumping: 1. Optical pump... 1
- Calculate the V number of an optical fibre having numerical aperture 0.25 and core diameter 20 μm NA = 0.25 Core diameter = 20 μm λ0= 1.55 μm Formula: V = ᴨd / λ0 ×NA V = 3.14×20×10⁻⁶ /1.55 ×10⁻⁶ ×0.25 V = 10.13 1
- What is Rayleigh’s criterion of resolution? Define resolving power of grating? According to the Rayleigh’s criterion, two closely spaced point sources of light are said to be just resolved by an optical instrument only... 2
- Why the Newton’s rings are circular and centre of interference pattern (reflected) is dark? In both air-wedge film and newton’s ring experiments, each fringe is the locus of points of equal thickness of the film. In newton’s ring ex... 2
- We want answer of question where is the question , please add comment to the question 1