Homework Statement
Is intensity related to this question? The answer is B.
Homework Equations
I^2 ∝ A^2
I=P/A,
where I is intensity, P is power, and A is area
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...