Consider light travelling from a medium A to medium B separated by a plane interface. If the light undergoes total internal reflection during its travel from medium A to B and the speed of light in media A and B are \( 2.4 \times 10^8 \, \text{m/s} \) and \( 2.7 \times 10^8 \, \text{m/s} \), respectively, then the value of critical angle is:
