The refractive index of a given transparent medium is 1.4. Which of the following is the minimum internal angle for total internal reflection to take place in the medium? by Sunday | Sep 2 | Physics WAEC | 0 comments A. 30° B. 36° C. 44° D. 46° E. 54° Correct Answer: Option D – 46° Users Also Read These:The refractive index of a medium relative to air is…A ray of light is incident on an equilateral…A ray of light incident at an angle θ in a…A transparent rectangular block 5.0cm thick is…A ray of light is incident at an angle of 30°on a…