1. The problem statement, all variables and given/known data Is intensity related to this question? The answer is B. 2. Relevant equations I^2 ∝ A^2 I=P/A, where I is intensity, P is power, and A is area 3. The attempt at a solution I tried using I=P/A, and after substituting, I get, A^2=E/S, which gives E=A^2 S And then, the new wave now is (2A)^2= x/(1/2S), where x is the energy per unit time after the changes, and this gives x=8 A^2 S, which..does not give an answer..