engineering recuitment NIELIT Scientific Assistant Mock Test 2025 Electromagnetic Theory Waveguides and Guided Waves Optical Fiber
The critical angle θc in an optical fiber is given by ______. Where n1 is refractive index of medium 1 and n2 is the refractive index of medium 2.
1
sin-1 (n2/n1)
2
sin-1 (n1/n2)
3
sin-1 (n2*n1)
4
sin-1 n2