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  2. File:SquareWaveFourierArrows,rotated,nocaption 20fps.gif

    en.wikipedia.org/wiki/File:SquareWaveFourier...

    And the purple dot is the sum of all six. The arrows represent the amplitudes of sine functions with different peak-values and frequencies. They are the first six terms of a Fourier series derived from the square wave motion of the blue dot, which transitions between only two amplitudes.

  3. Accordion effect - Wikipedia

    en.wikipedia.org/wiki/Accordion_effect

    A moving line of cars, a situation susceptible to the accordion effect.. In physics, the accordion effect (also known as the slinky effect, concertina effect, elastic band effect, and string instability) occurs when fluctuations in the motion of a traveling body cause disruptions in the flow of elements following it.

  4. Wave - Wikipedia

    en.wikipedia.org/wiki/Wave

    A plane wave is classified as a transverse wave if the field disturbance at each point is described by a vector perpendicular to the direction of propagation (also the direction of energy transfer); or longitudinal wave if those vectors are aligned with the propagation direction. Mechanical waves include both transverse and longitudinal waves ...

  5. Longitudinal wave - Wikipedia

    en.wikipedia.org/wiki/Longitudinal_wave

    "Longitudinal waves" and "transverse waves" have been abbreviated by some authors as "L-waves" and "T-waves", respectively, for their own convenience. [1] While these two abbreviations have specific meanings in seismology (L-wave for Love wave [2] or long wave [3]) and electrocardiography (see T wave), some authors chose to use "ℓ-waves" (lowercase 'L') and "t-waves" instead, although they ...

  6. String vibration - Wikipedia

    en.wikipedia.org/wiki/String_vibration

    Vibration, standing waves in a string. The fundamental and the first 5 overtones in the harmonic series. A vibration in a string is a wave. Resonance causes a vibrating string to produce a sound with constant frequency, i.e. constant pitch. If the length or tension of the string is correctly adjusted, the sound produced is a musical tone.

  7. File:Standing wave SWR 1.5 (forward, reflected) open.gif

    en.wikipedia.org/wiki/File:Standing_wave_SWR_1.5...

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  8. Mechanical wave - Wikipedia

    en.wikipedia.org/wiki/Mechanical_wave

    Mechanical waves can be produced only in media which possess elasticity and inertia. There are three types of mechanical waves: transverse waves, longitudinal waves, and surface waves. Some of the most common examples of mechanical waves are water waves, sound waves, and seismic waves. Like all waves, mechanical waves transport energy.

  9. Standing wave - Wikipedia

    en.wikipedia.org/wiki/Standing_wave

    In terms of longitudinal displacement, closed ends of pipes correspond to nodes since air movement is restricted and open ends correspond to anti-nodes since the air is free to move. [18] [23] A similar, easier to visualize phenomenon occurs in longitudinal waves propagating along a spring. [24] We can also consider a pipe that is closed at ...