Question

Select One Correct Option from the following: A ray of light from denser medium strikes a rarer medium at an angle of incidence i (see fig.). The reflected and refracted rays make an angle of $90/°$ with each other. The angles of reflection and refraction are r and $r'$. The critical angle
(A) $\sin^{-1} (\tan r)$
(B) $\sin^{-1} (\cot i)$
(C) $\sin^{-1} (\tan \ r' )$(D) $\tan^{-1} (\sin i)$.

Answer 1

a option is correct.
mark brainliest if you like

Answer 2

Select One Correct Option from the following: A ray of light from denser medium strikes a rarer medium at an angle of incidence i (see fig.). The reflected and refracted rays make an angle of $90/°$ with each other. The angles of reflection and refraction are r and $r'$. The critical angle

✴️ (A) $\sin^{-1} (\tan r)$

(B) $\sin^{-1} (\cot i)$

(C) $\sin^{-1} (\tan \ r' )$(D) $\tan^{-1} (\sin i)$.