![]() Since the wavelength of a wave depends upon the frequency and the speed, two waves having the same frequency and the same speed must also have the same wavelength.Being connected to one another, they must vibrate at the same frequency.Every particle within the rope will have the same frequency. ![]() A similar line of reasoning explains why the incident and reflected pulses have the same wavelength.Since the speed of a wave (or pulse) is dependent upon the medium through which it travels, two pulses in the same medium will have the same speed.Of course, it is not surprising that the speed of the incident and reflected pulse are identical since the two pulses are traveling in the same medium.The amplitude of the reflected pulse is less than the amplitude of the incident pulse.The wavelength of the reflected pulse is the same as the wavelength of the incident pulse.The speed of the reflected pulse is the same as the speed of the incident pulse.Similarly, if a downward displaced pulse is incident towards a fixed end boundary, it will reflect and return as an upward displaced pulse.That is, if an upward displaced pulse is incident towards a fixed end boundary, it will reflect and return as a downward displaced pulse. ![]() A portion of the energy carried by the pulse is transmitted to the pole, causing the pole to vibrate.The disturbance that returns to the left after bouncing off the pole is known as the reflected pulse. A portion of the energy carried by the pulse is reflected and returns towards the left end of the rope.When the incident pulse reaches the boundary, two things occur:.This pulse is called the incident pulse since it is incident towards (i.e., approaching) the boundary with the pole.If a pulse is introduced at the left end of the rope, it will travel through the rope towards the right end of the medium.This end of the rope is referred to as a fixed end. The last particle of the rope will be unable to move when a disturbance reaches it. ![]()
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