Heinrich Hertz - He was the first person to transmit and receive controlled radio waves., Longitudinal Waves - Are the waves where the displacement of the medium is in the same direction as the direction of the travel of the wave., Transverse Waves - Waves that cause the medium to move perpendicular to the direction of the wave., Electromagnetic Waves - Waves that are created as a result of vibrations between an electric field and a magnetic field, Hertz - Unit of Frequency,

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