LASER and Fiber fiber Questions and Answers in PDF What is a Laser? Give major properties of laser light. Or Explain in brief the characteristics of a laser beam. Or How does laser differ from ordinary light? What are Einstein’s coefficients? Derive Einstein’s relation. Or Explain the three quantum processes of interaction of radiation with the matter and derive the … [Read more...] about LASER and Fiber fiber Questions and Answers | Notes
numerical aperture
Fiber optics: Derivation for acceptance angle or numerical aperture
Derive an expression for Acceptance angle or Numerical aperture for fiber optics. Derive an expression for Fractional refractive index change or relative refractive index Answer: The light propagates through the fiber only when its angle of incidence at the launching end is less than or equal to a certain value. This maximum possible angle with the axis of the fibre up to … [Read more...] about Fiber optics: Derivation for acceptance angle or numerical aperture