Answer-Longitudinal waves cannot travel through –

Longitudinalwavescannottravel through vacuum because such wave requires a medium such as solid liquid or air to travel through. They cannot travel through vacuum or inspace.Longitudinal waves,also knownas l- waves, are waves that have the same direction of vibration as their direction of travel, which meansthatthemovementofthemediumisinthe same direction as, or the opposite direction to, the motion of the wave.