The refractive index of a medium relative to air is 1.8. Calculate the critical angle for the medium to the nearest degree. By: Sunday|Published on: Aug 29|Categories: Physics WAEC| 0 comments A. 18° B. 34° C. 45° D. 68° E. 90° Correct Answer: Option B – 34° Users Also Read These:A swimming pool is 2.1m deep. If it contains water…The refractive index of a material is 1.5. Calculate…The critical angle for light travelling from a…Calculate the refractive index of the material of…A ray of light is incident at an angle of 30°on a…SEE ALSO When the downward current flows in a straight vertical conductor, the direction of its magnetic field at a point due north of the wire is?