Answer & explanation
Correct answer: option 3
Refractive index of A w.r.t B = $\mu_{A,B} = \frac{V_B}{V_A} = \frac{5}{4}$
Critical angle = $Sin^{-1}\frac{1}{\mu_{A,B}}$ = $Sin^{-1}\frac{4}{5}$
Correct answer: option 3
Refractive index of A w.r.t B = $\mu_{A,B} = \frac{V_B}{V_A} = \frac{5}{4}$
Critical angle = $Sin^{-1}\frac{1}{\mu_{A,B}}$ = $Sin^{-1}\frac{4}{5}$