Question
Two particles are oscillating allong two close parallel straight line sid by side , with the same frequency and amplitudes . They pass each other , moving in opposite direction when their displacement is half of the amplitude. The mean positions of the two particles lie on astraigjt line perpenducular to the paths of the two partcles. the phase difference is?(1) π(2) π/6(3) 0(4) 2π/