In physics, mathematics, and related fields, a wave is a disturbance (change from equilibrium) of one or more fields such that the field values oscillate repeatedly about a stable equilibrium (resting) value. If the relative amplitude of oscillation at different points in the field remains constant, the wave is said to be a standing wave. If the relative amplitude at different points in the field changes, the wave is said to be a traveling wave. Waves can only exist in fields when there is a force that tends to restore the field to equilibrium.
The types of waves most commonly studied in physics are mechanical and electromagnetic. In a mechanical wave, stress and strain fields oscillate about a mechanical equilibrium. A traveling mechanical wave is a local deformation (strain) in some physical medium that propagates from particle to particle by creating local stresses that cause strain in neighboring particles too. For example, sound waves in air are variations of the local pressure that propagate by collisions between gas molecules. Other examples of mechanical waves are seismic waves, gravity waves, vortices, and shock waves. In an electromagnetic wave the electric and magnetic fields oscillate. A traveling electromagnetic wave (light) consists of a combination of variable electric and magnetic fields, that propagates through space according to Maxwell's equations. Electromagnetic waves can travel through transparent dielectric media or through a vacuum; examples include radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.
Other types of waves include gravitational waves, which are disturbances in a gravitational field that propagate according to general relativity; heat diffusion waves; plasma waves, that combine mechanical deformations and electromagnetic fields; reaction-diffusion waves, such as in the Belousov–Zhabotinsky reaction; and many more.
Mechanical and electromagnetic waves transfer energy,, momentum, and information, but they do not transfer particles in the medium. In mathematics and electronics waves are studied as signals. On the other hand, some waves do not appear to move at all, like standing waves (which are fundamental to music) and hydraulic jumps. Some, like the probability waves of quantum mechanics, may be completely static.
A physical wave is almost always confined to some finite region of space, called its domain. For example, the seismic waves generated by earthquakes are significant only in the interior and surface of the planet, so they can be ignored outside it. However, waves with infinite domain, that extend over the whole space, are commonly studied in mathematics, and are very valuable tools for understanding physical waves in finite domains.
A plane wave seems to travel in a definite direction, and has constant value over any plane perpendicular to that direction. Mathematically, the simplest waves are the sinusoidal ones in which each point in the field experiences simple harmonic motion. Complicated waves can often be described as the sum of many sinusoidal plane waves. A plane wave can be a transverse, if its effect at each point is described by a vector that is perpendicular to the direction of propagation or energy transfer; or longitudinal, if the describing vectors are parallel to the direction of energy propagation. While mechanical waves can be both transverse and longitudinal, electromagnetic waves are transverse in free space.

View More On
  1. J

    samsung wave 2 gt s8530 light problems

    Hi, dear admin and fellows, my problem is a samsung wave2 s8530 light, this device was water damage,after cleaning ev'rything ok but light,if could help me getting light ic ie,where available or equivalent.... thank
  2. D

    samsung wave 525 mic solution needed

    samsung wave 525 (s5253) mic not working plz anybody give solution for this, i m in a big trouble plz reply fast my mail id is-------
  3. Y

    i need samsung anycall wave 2 M210s fs file

    hi bro, plz i need samsung anycall wave 2 M210s fs file i have downloaded two firmwares but don't have fs file
  4. J

    JIG JTAG for Riff available - HOT models Samsung Wave, Samsung Galaxy S

    FIRST IN THE WORLD JTAG JIG (NO SOLDERING) for HTC HD2/LEO, HTC Touch Cruise P3650, ZTE F880, AMOI S2.... just connect to Riff and you got unbrick your phone withtin seconds ON MONDAY WILL PUT SOME VIDEOS ON YOUTUBE FROM REPAIR PROCESS OF ABOVE USING RIFF... HTC HD2 LEO HTC Touch...
  5. L

    Samsung Wave S7230E unlock Done

    Got an Samsung S7230E unlock Thru Z3x: How to: Simple trick is that Wave S7230E is not on model list Choose the S8500 As a Model. then wait for the phone to be detected then choose usb configuration on phone. Use usb micro cable then hit the direct unlock wait till finish. Shots...
  6. J

    SL-BOX Samsung v1.49 Unlcok S8600 - Wave 3

    SL-BOX Samsung v1.49 Unlock S8600 - Wave 3 DIRECT UNLOCK / READ UNLOCK CODE How to Unlock S8600 - Wave 3 by Easy way 1. Download original firmware XXKJC version. ( One click file hosting: S8600XXKJC_OXA.rar) 2. Flash the firmware to phone using Original tool. 3...
  7. B

    Samsung s5253 wave still at starting logo

    Any body help me My Samsung s5253 wave still at starting logo i did flash but problm still
  8. R

    s8500 wave 1.1 to 1.2 version update

    hello now a days all need to update 1.1 to 1.2 version wave (s8500) here is the tested solution from me :) use this firmware Rajesh(imeisource) and use this flasher Rajeshchiyyan(imeisource) 1.just connect your device in boot mode (by pressing volume down + camera + power ) 2. and connect...
  9. J

    RIFF JTAG - Samsung S7230E Wave 723 Unbrick – Boot Repair supported

    08.04.2011 Samsung S7230E Wave 723 Unbrick – Boot Repair supported Resurrecting Samsung S7230E is easy. To power the phone connect USB cable and insert battery. In case phone is not detected de-power phone completely, then wait few seconds, insert USB cable and then insert battery...
  10. J

    ORT-JTAG - Samsung GT-S8530 WAVE II Unbrick / Repair Dead Boot

    ORT - JTAG UPDATE [08 Apr 2011] Description : ORT Plus V1.36 Samsung S8530 Repair Dead Boot What's new in ORT Plus V1.36 ? QSC 6020 [0x200BF0E1][0x0x220B20E1] Error Detection improved RE-Connect Function Added Released Stuffs : ORT Plus V1.36 Samsung GT-S8530 Dump File...
  11. J

    RIFF JTAG - Samsung WAVE S8500 SIngle Click Unbrick ! Unlock by Clonning too !

    02.09.2010 Samsung WAVE Single Click Unbrick/Repair dead boot released WORLD FIRST ! ! ! ! Please start JTAG Manager and click “Check for Updates” button. You’ll be notified about new DLL, download it and restart the software. “Samsung_S8500.dll” contains pinout, repair instructions and...