A ray of light from a denser medium strikes a rarer medium at an angle of incidence i. The reflected and refracted rays make an angle of 90° with each other. The angles of reflection and refraction are i and r. The critical angle is :-

Question

G1 Physics · Accepted Answer

Derived solution: Step 1: Apply Snell’s law n₁sin i = n₂sin r. For total internal reflection the ray must go from denser to rarer medium and sin C = n₂/n₁. Step 2: Test each statement independently using these relations and the data/figure. Step 3: The statements that satisfy the required optical conditions are A: sin⁻¹ (tan r); B: sin⁻¹ (tan i). Hence the correct answer is A,B.