1. The problem statement, all variables and given/known data Two superimposing waves are represented by equations y1= 2sin 2π(10t – 0.4x) y2= 4sin 2π(20t – 0.8x) Find the ratio of Imax and Imin. Ans is (25:9) 2. Relevant equations 3. The attempt at a solution I know that intensity is proportional to the square of amplitude and maximum amplitude = a1 + a2 minimum amplitude = a1 - a2 but these equations are only applicable for waves with same frequency. so how do I proceed ? Thanks in advance!