
	Where results make sense

Topic: Wave interference

Related Topics

Huygens principle

Thomas Young (scientist)

Hell

Greek mythology

Barbara and Jenna Bush

June 13

In the News (Wed 9 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Interference
		The result of adding two waves of the same frequency depends on the value of the phase of the wave at the point in which the waves are added.
		To explain the origin of the interference pattern, consider the distance traveled from the two sources.
		At the center of the screen the waves from the two sources are in phase.
	members.tripod.com /~vsg/interfer.htm (241 words)

	Physics 128 Lecture: Wave Motion
		Waves are identified by the relationship between the motion of the disturbance and the motion of the medium.
		Transverse waves are waves in which the motion of the particles in the medium is perpendicular to the direction of motion of the disturbance.
		Longitudinal waves are waves in which the motion of the particles in the medium is in the same (or opposite) direction as the motion of the disturbance.
	www.cord.edu /dept/physics/p128/lecture99_33.html (1382 words)

	Interference of Waves (Site not responding. Last check: 2007-11-04)
		The interference of waves causes the medium to take on a shape which results from the net effect of the two individual waves upon the particles of the medium.
		In this case, a sine trough with an amplitude of -1 unit (negative means a downward displacement) interferes with a sine trough with a displacement of -1 unit.
		When two waves interfere, the resulting displacement of the medium at any location is the algebraic sum of the displacements of the individual waves at that same location.
	www.glenbrook.k12.il.us /gbssci/phys/Class/waves/u10l3c.html (1340 words)

	The Physics Classroom
		The interference of sound waves causes the particles of the medium to behave in a manner that reflects the net effect of the two individual waves upon the particles.
		Interference can occur as the result of sound from two speakers meeting at the same location as well as the result of sound from a speaker meeting with sound reflected off the walls and ceilings.
		The diagram shows two waves interfering, but this time there is no clear mathematical relationship between their frequencies (in computer terms, one has a wavelength of 37 and the other has a wavelength 20 pixels).
	www.physicsclassroom.com /Class/sound/U11L3a.html (2415 words)

	Music lab (Site not responding. Last check: 2007-11-04)
		The height of a peak is the amplitude of a wave.
		Waves are sent in both directions along the string, reflect off the end struts and interfere with one another after reflecting.
		This results in a standing wave with four nodes (one at each end, one that is 1/3 of the way along the string, and a matching one that is 2/3 of the way along the string), and a wavelength only one-third as long as that of the fundamental wave.
	www.kineticbooks.com /physics/triallabs/Music/Music.html (4554 words)

	Interference of Sound
		If their amplitudes add, the interference is said to be constructive interference, and destructive interference if they are "out of phase" and subtract.
		Interference of incident and reflected waves is essential to the production of resonant standing waves.
		Interference has far reaching consequences in sound because of the production of "beats" between two frequencies which interfere with each other.
	hyperphysics.phy-astr.gsu.edu /hbase/sound/interf.html (281 words)

	The Physics Classroom
		For example, the interference of a crest with a trough is an example of destructive interference.
		The principles were subsequently applied to the interference of sound waves in Unit 11 of The Physics Classroom.
		Any type of wave, whether it be a water wave or a sound wave should produce a two-point source interference pattern if the two sources periodically disturb the medium at the same frequency.
	www.physicsclassroom.com /Class/light/U12L1b.html (1558 words)

	Physics 20 - Diffraction and Other Wave Phenomena
		When waves pass through a slit, diffraction is maximized when the wavelength and the slit width are within the same order of magnitude.
		An interference pattern of water waves produced by two point sources vibrating in phase produces a symmetrical pattern of nodal lines and areas of constructive interference.
		Observe a standing wave interference pattern produced in a one dimensional medium such as a stretched rope.
	www.sasked.gov.sk.ca /docs/physics/u2b22phy.html (844 words)

	Lab 2: Sine wave, Interference
		We will first generate a single wave and see the effect of changing the amplitude, frequency and phase on that wave.
		In column B, create a wave with a frequency of 100, amplitude of 10 and phase of 0.
		Change the phase of the wave in column C to 0.
	www.clas.ufl.edu /users/rahul/3011/lab2sinewaveInterference.htm (233 words)

	Diffraction and interference
		Reflection, refraction, diffraction, and interference are phenomena observed with all waves.
		If the interference pattern is viewed on a screen a distance L from the slits, then the wavelength can be found from the spacing of the fringes.
		The bright fringes, which come from constructive interference of the light waves from different slits, are found at the same angles they are found if there are only two slits.
	electron9.phys.utk.edu /phys136d/modules/m9/diff.htm (1293 words)

	Interference of water waves
		The pattern of interference relies on the wavelength, the separation and the phase difference between the two sources.
		Constructive interference occurs at a point when the two waves arriving there are vibrating in the same direction (in phase).
		Destructive interference occurs at a point when the two waves arriving there are vibrating in the opposite directions (anti-phase).
	www.ngsir.netfirms.com /englishhtm/Interference.htm (349 words)

	Medium Wave Circle ~ What is Medium Wave DX? - Interference (Site not responding. Last check: 2007-11-04)
		Interference is usually taken to mean any unwanted signal (or noise) that, by adding to the desired signal, degrades reception of the wanted information.
		Splatter or adjacent channel interference can be recognised as unintelligible modulation or programmes heard mixed with the desired programme with the interfering signal originating from a station transmitting on a channel adjacent to that of the desired station.
		To test if adjacent channel interference is in fact receiver generated an aerial attenuator should be used to reduce the strength of the incoming signal; if the relative degree of interference reduces, a receiver effect should be suspected but if no change is observed then it is possible that the interference is actually being transmitted.
	www.mwcircle.org /page31.htm (1517 words)

	Bubble Colors
		ll waves, including light, have a curious property: if two waves combine, the waves can meet each other crest-to-crest, adding up and reinforcing the effect of each other, or they can meet crest-to-trough, cancelling each other out so that they have no effect.
		When they meet crest-to-trough, for every "up" vibration in one wave, there is a corresponding "down" vibration in the other wave.
		Interference is responsible for the pearly luster of an abalone shell, the beautiful colors in some bird feathers and insect wings, and the flowing patches of color in an oil slick on the street after a rain shower - and for the color of bubbles.
	www.exploratorium.edu /ronh/bubbles/bubble_colors.html (671 words)

	Dolores Gende: PhysicsQuest : WAVE BEHAVIOR (Site not responding. Last check: 2007-11-04)
		Wave Interference occurs when two waves meet while traveling along the same medium.
		To begin our exploration of wave interference, consider two pulses of the same amplitude traveling in different directions along the same medium.
		In this simulation the wave with larger amplitude is the red wave.
	physicsquest.homestead.com /quest11ac2.html (410 words)

	Wave Interference (Site not responding. Last check: 2007-11-04)
		This applet illustrates the principles of constructive and destructive interference in transversal waves.
		Start by shaping the two waves using the two sets of four handles located at both ends of the line.
		You may either "play" a movie showing the waves traveling and interfering, or click and drag the slider to set the waves positions manually.
	mysite.verizon.net /vzeoacw1/wave_interference.html (65 words)

	2-Point Source Interference Patterns (Site not responding. Last check: 2007-11-04)
		Wave interference is a phenomenon which occurs when two waves meet while traveling along the same medium.
		Nodes are produced when destructive interference always occurs at the same location; a crest and a trough with the same magnitude of displacement interfere to provide complete destructive interference and no resulting displacement of the medium.
		Young used wave principles to establish that the wavelength of light could be mathematically related to the separation distance, the distance to the screen, and the distance between anti-nodal lines (bright spots).
	www.glenbrook.k12.il.us /gbssci/phys/mmedia/waves/ipd.html (614 words)

	The world's top interference websites (Site not responding. Last check: 2007-11-04)
		The principle of superposition of waves states that the resultant displacement at a point is equal to the sum of the displacements of different waves at that point.
		Interference is involved in Thomas Young's double-slit experiment where coherent light (light which is in the same phase, and has the same frequency and wavelength) interferes to produce an interference pattern.
		When a single source interferes with itself, the principle of conservation of energy dictates that the energy "missing" from the darkened regions of an interference pattern where destructive interference has taken place will be found in the brightened portions where constructive interference has taken place.
	www.websbiggest.com /wiki-article-tab.cfm/interference (605 words)

	Wave Optics
		Wave Optics on the Computer consists of a set of computer programs and a physics guide which is recommended to read before getting starting with the programs.
		The influence of light coherent properties and finite size of the sources on the interference pattern is studied.
		While various parameters of the model (such as wave length, period and number of slits, etc.) can be varied by the user the program calculates angular dispersion, dispersion range, resolution power etc, and presents the results in vivid pictures to be easily understood and remembered by students.
	www.openteach.com /products/wav.php (736 words)

	BBC - Education Scotland - Higher Bitesize Revision - Physics - Radiation and matter - Waves: Revision 2
		A wave detector may be moved across the interference pattern to find points of constructive and destructive interference.
		For visible light, a screen is used to show the interference pattern at the plane of the screen.
		When waves are incident on a grating all of the lines act as coherent sources of the waves.
	www.bbc.co.uk /scotland/education/bitesize/higher/physics/radiation/waves2_rev.shtml (510 words)

	The calculus of wave interference
		Water waves and quantum-mechanical waves are governed by an underlying dynamic described by a wave equation.
		The quantum mechanical wave equation is a linear differential equation.
		Now, to work out the value of the wave at any position, all we have to do is add (by vector addition), the two complex values determined by the phase and modulus of each of the two phase threads.
	www.rodenburg.org /theory/y800.html (667 words)

	Experiment 3: Interference
		For an interference pattern to be observable, the phase difference between the interfering waves must remain fairly constant in time.
		In amplitude-splitting interferometers, the two interfering waves are obtained by partial reflection and transmission of the same wave.
		If the waves are partially coherent but have the same intensity, the fringe visibility becomes a measure of the degree of coherence.
	www.ee.bilkent.edu.tr /~ee428/manual/html/node7.html (747 words)

	Interference FAQs (Site not responding. Last check: 2007-11-04)
		For example, to produce interference patterns in a ripple tank, the two objects moving in and out of the water must connected to the same vibrating source.
		Of course, if waves are different shapes, you cannot expect to produce destructive interference because the two waves can never overlap completely.
		For the case of the square wave, the component waves have frequencies of 3, 5, 7, etc. times that of the resultant square wave.
	acad.udallas.edu /physics/GP1/interference_faqs.htm (433 words)

	Superposition of Waves
		This is true of waves which are finite in length (wave pulses) or which are continuous sine waves.
		Two waves (with the same amplitude, frequency, and wavelength) are travelling in the same direction on a string.
		If two sinusoidal waves having the same frequency (wavelength) and the same amplitude are travelling in opposite directions in the same medium then, using superposition, the net displacement of the medium is the sum of the two waves.
	www.kettering.edu /~drussell/Demos/superposition/superposition.html (776 words)

	Wave Interference
		Wave Interference OS Win 9X, NT This is a simulation that you can download and run on your computer.
		Below is a screen shot of the simulation demonstrating wave interference.
		Wave1 and Wave2 are both sinusoidal waves of the same amplitude and wave length.
	www.edaboard.com /ftopic38910.html (108 words)

	Wave Interaction
		When waves interact, they superimpose on each other, and the amplitude of the sound pressure or particle displacement at any point of interaction is the sum of the amplitudes of the two individual waves.
		When the origins of the two interacting waves is not the same, it is a little harder to picture the wave interaction, but the principles are the same.
		At every point where the waves interact, the amplitude of the particle displacement is the combined sum of the amplitude of the particle displacement of the individual waves.
	www.ndt-ed.org /EducationResources/CommunityCollege/Ultrasonics/Physics/WaveInterference.htm (703 words)

	Two Slit Experiemnt - Quantum Wave Interference at Home
		These waves of probability engulf the other balls until suddenly at one point of the wave the original ball snaps back into existence and the rest of the wave vanishes.
		Quantum wave interference only happens when "nobody is watching" them pass thru the slits.
		An interference pattern like this is a solution of the Wave Equation and we know that even though the light is made of individual photons, each one is somehow passing through both slits at the same time like a wave.
	www.altair.org /TwoSlit.html (1419 words)

	Using Bubbles to Learn about Light Interference
		To understand the wave properties of light, especially the phenomenon of interference.
		Interference is the addition, or coming together, of several waves.
		Well, since the color of the fringes (and also their spacing) is related to the thickness of the film, we can use this to measure the thickness of films, which are too thin to measure with, say, a ruler.
	reachoutmichigan.org /funexperiments/agesubject/lessons/bubbles.html (929 words)

	Wave Interference
		The wave machine shows that, when two different waves overlap, the resulting wave is the sum of the two original waves.
		In a sound wave, it is an increase or decrease in the pressure of the air.
		To show deconstructive interference, form a trough at one end of the wave machine and a crest at the other.
	www.ap.stmarys.ca /demos/content/osc_and_waves/wave_interference/wave_interference.html (333 words)

Try your search on: Qwika (all wikis)