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  2. Wave packet - Wikipedia

    en.wikipedia.org/wiki/Wave_packet

    A looped animation of a wave packet propagating without dispersion: the envelope is maintained even as the phase changes. In physics, a wave packet (also known as a wave train or wave group) is a short burst of localized wave action that travels as a unit, outlined by an envelope.

  3. Wavelet packet decomposition - Wikipedia

    en.wikipedia.org/wiki/Wavelet_packet_decomposition

    Wavelet Packet Decomposition is a powerful signal processing technique that offers a multi-resolution analysis of the timber's moisture content. This approach allows for a detailed examination of the signal at different frequency bands, providing a more comprehensive understanding of the moisture distribution within the material.

  4. Group velocity - Wikipedia

    en.wikipedia.org/wiki/Group_velocity

    The expanding ring of waves is the wave group or wave packet, within which one can discern individual waves that travel faster than the group as a whole. The amplitudes of the individual waves grow as they emerge from the trailing edge of the group and diminish as they approach the leading edge of the group.

  5. Coherence length - Wikipedia

    en.wikipedia.org/wiki/Coherence_length

    A wave with a longer coherence length is closer to a perfect sinusoidal wave. Coherence length is important in holography and telecommunications engineering. This article focuses on the coherence of classical electromagnetic fields. In quantum mechanics, there is a mathematically analogous concept of the quantum coherence length of a wave function.

  6. Landau damping - Wikipedia

    en.wikipedia.org/wiki/Landau_damping

    Second-order initial conditions are found that suppress secular behavior and excite a wave packet of which the energy agrees with fluid theory. The figure shows the energy density of a wave packet traveling at the group velocity, its energy being carried away by electrons moving at the phase velocity. Total energy, the area under the curves, is ...

  7. Correspondence principle - Wikipedia

    en.wikipedia.org/wiki/Correspondence_principle

    But for Bohr the important result was the use of classical analogies and the Bohr atomic model to fix inconsistencies in Planck's derivation of the blackbody radiation formula. [9]: 118 Bohr used the word "correspondence" in italics in lectures and writing before calling it a correspondence principle. He viewed this as a correspondence between ...

  8. Wavepacket - Wikipedia

    en.wikipedia.org/?title=Wavepacket&redirect=no

    Download as PDF; Printable version; In other projects Appearance. move to sidebar hide. From Wikipedia, the free encyclopedia. Redirect page. Redirect to: Wave packet;

  9. Coherent state - Wikipedia

    en.wikipedia.org/wiki/Coherent_state

    In the limit of large field the state becomes a good approximation of a noiseless stable classical wave. The average photon numbers of the three states from top to bottom are n =4.2, 25.2, 924.5 [5] Figure 2: The oscillating wave packet corresponding to the second coherent state