JEE Main & Advanced
Physics
Ray Optics
Question Bank
Self Evaluation Test - Ray Optics and Optical Instruments
question_answer
A light beam is travelling from Region I to IV (figure). The refractive index in regionals I, II, III and IV are \[{{n}_{0}},\frac{{{n}_{0}}}{2},\frac{{{n}_{0}}}{6}\] and \[\frac{{{n}_{0}}}{8}\] respectively The angle of incidence 6 for which the beam just misses entering region IV is -