OPTICAL FIBER MCQs 11 min Score: 0 Attempted: 0/11 Subscribe 1. . The angle of incidence for which the angle of refraction is 90° is called: (A) Right angle (B) Crucial angle (C) Critical angle (D) Visual angleShow All Answers 2. . The relationship between critical angle ‘C’ and refractive index ‘n’ is: (A) n = sin C (B) n = 1/sin C (C) n = cos C (D) n = tan CShow All Answers 3. . The refractive index of glass is: (A) 1.33 (B) 1.4 (C) 2.5 (D) 1.52Show All Answers 4. . The refractive index of water is: (A) 1.5 (B) 2.33 (C) 1.33 (D) 0.33Show All Answers 5. . The raw material for optical fiber is: (A) Copper (B) Silver (C) Plastic (D) SilicaShow All Answers 6. . The signals are transmitted through optical fiber by: (A) Total internal reflection (B) Refraction (C) Dispersion (D) DiffractionShow All Answers 7. . The signals transmitted through optical fiber are: (A) Light signals (B) Electrical signals (C) Sound waves (D) Gamma raysShow All Answers 8. . The optical fiber through which only one signal is transmitted at a time is called: (A) Multi mode Graded index (B) Multi mode (C) Multi mode Step index (D) Mono modeShow All Answers 9. . The diameter of the core of single mode optical fiber is approximately equal to: (A) 5 mm (B) 8 μm (C) 5 m (D) 5 cmShow All Answers 10. . The diameter of the core of multi-mode fiber is approximately equal to: (A) 50 mm (B) 5 μm (C) 50 μm (D) 50 cmShow All Answers 11. . The central part of the optical fiber is called: (A) Cladding (B) Core (C) Optical center (D) KevlarShow All Answers