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A ray of light from denser medium strikes a rarer medium. The reflected and refracted rays make an angle of 90 degree with each other. The angles of reflection and refraction are r and r'. The critical angle would be |
| Answer» A ray of light from denser medium strikes a rarer medium. The reflected and refracted rays make an angle of 90 degree with each other. The angles of reflection and refraction are r and r'. The critical angle would be | |