FOC Assignment
Question Bank Principle of an optical fiber (total internal reflection) 1. Explain briefly 'basic principle of an optical fiber'. Ans. Optical fibres works on the principle of total internal reflection. When light ray strikes at the internal surface of optical fibre cable called such that incidence angle is greater than critical angle, then incident light ray reflects in the same medium and this phenomenon repeats. or Explain the principle of total internal reflection. Ans. Total internal reflection: When a light ray travels from denser medium to rarer medium, the angle of incidence is greater than critical angle then it reflects into the same medium. This phenomenon is called total internal reflection. Acceptance angle and Numerical aperture 2. Explain the terms numerical aperture and acceptance angle. Ans.The numerical aperture is determined by the core and cladding. The acceptance angle is determined by core, cladding, and the outside. The greater the difference in the inde