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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. 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 ...

  4. Ripple tank - Wikipedia

    en.wikipedia.org/wiki/Ripple_tank

    The speed of a wave in water depends on the depth, so the ripples slow down as they pass over the glass. This causes the wavelength to decrease. If the junction between the deep and shallow water is at an angle to the wavefront , the waves will refract.

  5. Electromagnetic spectrum - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_spectrum

    Generally, electromagnetic radiation is classified by wavelength into radio wave, microwave, infrared, visible light, ultraviolet, X-rays and gamma rays. The behavior of EM radiation depends on its wavelength. When EM radiation interacts with single atoms and molecules, its behavior also depends on the amount of energy per quantum (photon) it ...

  6. Polarization (waves) - Wikipedia

    en.wikipedia.org/wiki/Polarization_(waves)

    As a function of time t and spatial position z (since for a plane wave in the +z direction the fields have no dependence on x or y) these complex fields can be written as: (,) = [] = [] and (,) = [] = [] (), where λ = λ 0 /n is the wavelength in the medium (whose refractive index is n) and T = 1/f is the period of the wave.

  7. Kundt's tube - Wikipedia

    en.wikipedia.org/wiki/Kundt's_tube

    If the frequency f of the sound is known, multiplying it by the wavelength gives the speed of sound c in the air: c = λ f {\displaystyle c=\lambda f\,} The detailed motion of the powder is actually due to an effect called acoustic streaming caused by the interaction of the sound wave with the boundary layer of air at the surface of the tube.

  8. Trump transition team plans immediate WHO withdrawal ... - AOL

    www.aol.com/news/trump-transition-team-plans...

    Members of Donald Trump's presidential transition team are laying the groundwork for the United States to withdraw from the World Health Organization on the first day of his second term, according ...

  9. Wavelength - Wikipedia

    en.wikipedia.org/wiki/Wavelength

    The wavelength of a sine wave, λ, can be measured between any two points with the same phase, such as between crests (on top), or troughs (on bottom), or corresponding zero crossings as shown. In physics and mathematics, wavelength or spatial period of a wave or periodic function is the distance over which the wave's shape repeats.