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  2. 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 ...

  3. Sound - Wikipedia

    en.wikipedia.org/wiki/Sound

    Through solids, however, it can be transmitted as both longitudinal waves and transverse waves. Longitudinal sound waves are waves of alternating pressure deviations from the equilibrium pressure, causing local regions of compression and rarefaction, while transverse waves (in solids) are waves of alternating shear stress at right angle to the ...

  4. Mode conversion - Wikipedia

    en.wikipedia.org/wiki/Mode_conversion

    Mode conversion occurs when a wave encounters an interface between materials of different impedances and the incident angle is not normal to the interface. [1] Thus, for example, if a longitudinal wave from a fluid (e.g., water or air) strikes a solid (e.g., steel plate), it is usually refracted and reflected as a function of the angle of incidence, but if some of the energy causes particle ...

  5. Speed of sound - Wikipedia

    en.wikipedia.org/wiki/Speed_of_sound

    In a gas or liquid, sound consists of compression waves. In solids, waves propagate as two different types. A longitudinal wave is associated with compression and decompression in the direction of travel, and is the same process in gases and liquids, with an analogous compression-type wave in solids. Only compression waves are supported in ...

  6. Normal mode - Wikipedia

    en.wikipedia.org/wiki/Normal_mode

    Mechanical longitudinal waves have been also referred to as compression waves. For transverse modes, individual particles move perpendicular to the propagation of the wave. According to quantum theory, the mean energy of a normal vibrational mode of a crystalline solid with characteristic frequency ν is:

  7. 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.

  8. An unusual object has been releasing pulses of radio waves in ...

    www.aol.com/news/unusual-object-releasing-pulses...

    Some magnetars exist below what is called a “death line,” which means their magnetic fields are too weak to release energetic emissions of radio waves. That doesn’t seem to apply to the ...

  9. Longitudinal mode - Wikipedia

    en.wikipedia.org/wiki/Longitudinal_mode

    The first six longitudinal modes of a plane-parallel cavity. A longitudinal mode of a resonant cavity is a particular standing wave pattern formed by waves confined in the cavity. The longitudinal modes correspond to the wavelengths of the wave which are reinforced by constructive interference after many reflections from the cavity's reflecting ...