

MCQOPTIONS
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1. |
A ray of light is incident at an angle i from denser to rare medium. The reflected and the refracted rays are mutually perpendicular. The angle of reflection and the angle of refraction are respectively r and r' , then the critical angle will be [IIT-JEE 1983; MP PET 1995; CBSE PMT 1996; MP PMT 1985, 99; Pb. PET 2002] |
A. | \[{{\sin }^{-1}}(\sin \,r)\] |
B. | \[{{\sin }^{-1}}\,(\tan r')\] |
C. | \[{{\sin }^{-1}}\,(\tan i)\] |
D. | \[{{\tan }^{-1}}(\sin i)\] |
Answer» D. \[{{\tan }^{-1}}(\sin i)\] | |