Practice question

Given: A prism of refracting angle 30° and refractive index 1.6 produces what minimum deviation? Formula: For a thin prism: D_m = (n - 1) A. Substitution & Calculation: n = 1.6, A = 30° . D_m = (1.6 - 1) × 30 = 0.6 × 30 = 18° . Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.