1. Calculate the critical angle for a glass block of refractive index 1.45 2. Name the five types of optical fiber connectors. 3. Write short notes on the two methods of optical splicing. 4. Draw an optical fiber communication system and describe two (2) components only. 5. a. Fill in the blank spaces below of the fiber optical transmission window: Window Optical Fibre cable Operating Light Source Type Wavelength 800 - 900nm 1250-1350nm 1310nm Lasers 1500-1600nm Single Mode Lasers