AIIMS 2017 Physics Interference MCQ Question

In the context of wave interference, the intensity at a point is proportional to the square of the amplitude of the wave at that point. If point S₁ experiences constructive interference (resulting in maximum amplitude) and point S₂ experiences destructive interference (resulting in minimum amplitude), the intensity ratio can be expressed as $I_{S_1} : I_{S_2} = A_{S_1}^2 : A_{S_2}^2$. Given that $A_{S_2}$ approaches zero due to destructive interference, the intensity at S₂ becomes negligible, leading to an infinite ratio $I_{S_1} : I_{S_2} = \infty$. Options A (0) and C (4:1) are incorrect as they do not account for the nature of destructive interference, while option D (1:4) misrepresents the relationship between the amplitudes at the two points.