in a longitudinal wave compresions and rarefactions travel in?
452085
In longitudinal wave, the compressions (or rarefactions) are taking place parallel to   the direction of the wave motion.\n\nThe compressions and rarefaction of the materials take place about their equilibrium position.\n\nTHEY DO NOT TRAVEL.\n\nThe energy of motion alone is transferred from one place to another place.\n\nIn transverse wave the vibrations take place perpendicular to the motion of the wave. But the vibrations do not move from place to place.\n\nIf one says that the compressions and rarefactions move along the direction of wave,  we can say the vibrations travel along the direction of wave in transverse wave (in any type of wave) also.
27171
Its actually derived from Maxwell's Wave Equations, see source. Its too complex and requires mathematic symbols, so I can't type it here.
196324
try using geophysics book as your reference.\np (primary) waves travel on solid, liquid and gas mediums.\nS (shear) waves travel only on solid mediums.\nA proof of this, is an occurrence of earthquakes, is which the quake produces seismic waves and the seismic centers can measure this waves and telling the magnitude of an earthquake.\nIf the earth is hollow, they (siesmologists) couldn't measure the magnitude of earthquakes.
1023833
i usully see it with mine aswel but you know when the wave move it moves in both directions and make a stand wave wich has a still point and a high displace point and in the guitar u'll see a wave with crecentic multiple waves and if you see rectangle then its the illution caused by light!!! >>>>>
311007
YES\n\nSince sound waves are mechanical waves they are influenced by the medium in which they travel. But electromagnetic waves such as light and radio waves remain unafftected.
136442
The "something" is the direction of travel of the wave.  In transverse waves, the motion of the medium is perpendicular to the direction of travel of the wave.  Some examples are water waves and "the wave" in a stadium.  (People stand up, and the wave rolls around the stadium.)  Longitudinal waves are waves in which the medium moves back and forth in the same direction as the wave.  Some examples are sound waves and compression waves on a slinky.
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It's because p waves are faster than s waves, so the difference is related to how far away the source is.  The bigger the difference, the farther away.
272342
<LOL> NO! The doppler effect is about compression and rarifaction of a wave generated by a source moving through space. Time can only change with a warping of spacetime itself. Apples and oranges.
809778
When sound (or other waveform of similar shape, like an AC signal) travels through a medium, its intensity diminishes with distance. In idealized materials, signal amplitude is only reduced by the spreading of the wave. Natural materials, however, all produce an effect which further weakens the sound. This further weakening results from scattering and absorption. Scattering is the reflection of the sound in directions other than its original direction of propagation.  Absorption is the conversion of the sound energy to other forms of energy.  The combined effect of scattering and absorption is called attenuation.  Ultrasonic attenuation is the decay rate of the wave as it propagates through material.\n\nAttenuation of sound within a material itself is often not of intrinsic interest. However, natural properties and loading conditions can be related to attenuation. Attenuation often serves as a measurement tool that leads to the formation of theories to explain physical or chemical phenomenon that decreases the ultrasonic intensity. \n\nThe amplitude change of a decaying plane wave can be expressed as:\n\n A = A0*e^(-kz)\n\nIn this expression "A0" is the amplitude of the propagating wave at some location. The amplitude "A" is the reduced amplitude after the wave has traveled a distance "z" from that initial location. The quantity "k" is the attenuation coefficient of the wave traveling in the z-direction. The dimensions of are nepers/length, where a neper is a dimensionless quantity. The term "e" is Napier's constant which is equal to approximately 2.71828. \n\nAttenuation is generally proportional to the square of frequency. Quoted values of attenuation are often given for a single frequency, or an attenuation value averaged over many frequencies may be given. Also, the actual value of the attenuation coefficient for a given material is highly dependent on the way in which the material was manufactured. Thus, quoted values of attenuation only give a rough indication of the attenuation and should not be automatically trusted. Generally, a reliable value of attenuation can only be obtained by determining the attenuation experimentally for the particular material being used.\n\nThis is why higher-frequency signals tend to produce what is called "skin effect" ... basically, the energy isn't there for the wave to penetrate to any significant depth.
433304
I think you mean "Scalar" wave.  Google "Scalar" and you'll find what you are looking for.  Just make sure the CIA aren't watching you...\n\nThis message will self-destruct in 5, 4, 3......
98181
A mechanical wave exists in a medium (which on deformation is capable of producing elastic restoring forces) through which they travel and can transfer energy from one place to another without any of the particles of the medium being displaced permanently; there is no associated mass transport.
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"Both light and sound are waves." "and is there a physical analogous comparison of light waves to sound waves?"\n\nYes they are both waves. However, light is known as an electromagnetic wave which is a propagating disturbance of both the electric and magnetic field in space. Sound however is a pressure wave transmitted through a medium. Light waves are transverse meaning the direction of travel is perpendicular to the direction of oscillation. While sound waves are longitudinal meaning the direction of travel is parallel to the direction of oscillation. Another difference is that light waves DO NOT need a medium of travel (they can go through a vacuum) however sound waves exist only in a medium.\n\n"Sound is measured in Hz. how are light waves measured?"\nYou are correct, one measurement of sound is in Hz. However, waves have 4 unique properties. Velocity the rate that it propagates which is measured in m/s. Frequency, how many times the wave repeats itself in a period of time measured in Hz. Wavelength, the distance between complete cycles measured in meters. And finally, Amplitude or Intensity which is measured in decibels or W/m^2 which measures how high the crests become and how low the troughs become. The larger the amplitude the higher the peaks and lower the valleys. This is also measured in meters. Higher intensitys is proportional to the amount of energy the wave has. \n\nAs far as measuring a light wave, we usually measure the intensity and either the wavelength or frequency of the light wave.  The wavelength of light and sound is inversely proportional to the frequency because the velocity is fixed to the speed of sound 343 m/s or the speed of light 3.00 x 10^8 m/s.  \nThe higher the frequency of light, the more the light moves to the purple end of the spectrum (think about the rainbow). The human eye typically picks up light between 390 (purple) nm - 970 (red) nm\n\nvelocity = wavelength * frequency.
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http://en.wikipedia.org/wiki/Sound_waves
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maybe this will help you.\n\nhttp://www.scarborough.k12.me.us/wis/teachers/dtewhey/webquest/nature/seismic_waves.htm
576638
La detectacion de luz ,como photon o como onda, depende del typo o metodo de experimento para explorar la naturaleza de la luz. La luz exhibe la characteristica de honda en experimentos de diffraccion e interferencia y exhibe characteristicas de particula en experimentos de ionizacion de atomos con radiacion de varias energias. La luz se mueve en linea recta a menos que es reflejada o desviada por el medio atraves cual viaja. La luz que proviene de estrellas y galaxias distantes provee informacion soble la velocidad de esas estrellas y galaxias porque la luz como onda es cambiada como es cambiado el sonido de un tren qhe primero se aproxima y despues se aleja. ( vea terminos como "red-shift" and "doppler effect") El sonido aumenta cuando el tren viene y despues mengua cuando el tren se va.
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None, sound is a wave not a particle. Sound is just a wave of vibrations travelling through atoms.
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Not quite. Rarefaction is a comparitive word. It means that there are less molecules (per unit volume) at one spot then there is in the medium in general. E.g. in a sound wave the wavefronts are where the molecules bunch up together and the rarefactions are the spaces between where the medium is less dense.\nMolecules are more rare near a rarefaction.