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    Question

    Longitudinal waves cannot travel through –

    A Vacuum Correct Answer Incorrect Answer
    B Solid Correct Answer Incorrect Answer
    C Liquid Correct Answer Incorrect Answer
    D Gas Correct Answer Incorrect Answer

    Solution

    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.

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