Pathfinder Oscillations & Waves MCQ 2

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Published on December 25, 2021 4:15:55 PM ● Video Link: https://www.youtube.com/watch?v=YVyE4uU7wX0

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In figure-I, is shown acoustic pressure variation with position in a harmonic sound wave travelling in the positive x-direction. Period of the sound wave is 8 s. Figure-I was recorded at t= 10 s. In figure-II are shown variation in acoustic pressure by two curves recorded at two successive instants of time t =t1 and then t=t2. Both the figures are drawn to the same scale.
Which of the following sets correctly express possible values of the instant t1 and t2 ?