MHT CET 2023 Physics question
If a ray of light in denser medium strikes a rarer medium at an angle of incidence i, the angles of reflection and refraction are r and r' respectively. If the reflected and refracted rays are at right angles to each other, the critical angle for the given pair of media is
Answer: (B)
Solution
By the law of reflection . The reflected and refracted rays are perpendicular, so , i.e. . Snell's law from the denser medium (index ) to the rarer one (index 1): , so $ = =
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account