Two waves, each having a frequency of `100 Hz` and a wavelength of `2 cm`, are travelling in the same direction on a string. What is the phase difference between the wayes (a) if the second wave was produced `10 m` sec later than the first one at the same place (b) if the two waves were produced at a distance `1 cm` behind in the second one? (c) if each of the wave has an amplitude of `2.0 mm`, what would be the amplitude of the resultant waves in part (a) and (b) ?

Answer

(a) `2pi` , (b) `pi` , (c) `4.0 mm`, zero