PhysicsEasy105×since 2002Q7116Light travels in two media M1M_{1}M1 and M2M_{2}M2 with speeds 1.5×108 ms−11.5 \times 10^{8} \mathrm{~ms}^{-1}1.5×108 ms−1 and 2.0×108 ms−12.0 \times 10^{8} \mathrm{~ms}^{-1}2.0×108 ms−1 respectively. The critical angle between them is :Atan−1(37)\tan ^{-1}\left(\frac{3}{\sqrt{7}}\right)tan−1(73)Btan−1(23)\tan ^{-1}\left(\frac{2}{3}\right)tan−1(32)Ccos−1(34)\cos ^{-1}\left(\frac{3}{4}\right)cos−1(43)Dsin−1(23)\sin ^{-1}\left(\frac{2}{3}\right)sin−1(32)Check answerSkip