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Topic: Rectilinear propagation

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	Nondiffractig beams
		Rectilinear propagation is one of the most apparent properties of light.
		Historically, the diffraction effects are associated with violation of the rectilinear propagation of light.
		Due to the interference of the modes, the transverse intensity profile of the beam reappears periodically at the planes of the constructive interference and vanishes at the planes of the destructive interference.
	thunder.upol.cz /optics/research/nondiffracting_beams (2453 words)

	Rotating nozzle apparatus - Patent 5039013
		The thus increased centrifugal force acts on the jet water stream jetted from the nozzle, so that not only the rectilinear propagation property of the jet water stream is prevented but also the rectilinear jet water stream is disturbed, bringing the jet water stream into the state of spray.
		According to the invention, since the rectilinear propagation nozzle 7 is constituted in such a manner that the rectilinear propagation nozzle 7 can be rotated along the axis.alpha.
		To the cap 6 is threadably engaged the rectilinear propagation nozzle 7 having the rectifying piece 7a positioned on the inlet side, and the nozzle 7 is inclined and is extended in the direction of the axis C of the cap 6.
	www.freepatentsonline.com /5039013.html (2938 words)

	Optics of the Electromagnetic Spectrum
		It was not until 1827 that the experiments of Thomas Young and Augustin Fresnel on interference and the measurements of the velocity of light in liquids demonstrated the existence of optical phenomena for whose explanation a corpuscular theory was inadequate.
		Young's experiments enabled him to measure the wave lengths of the waves and Fresnel showed that the rectilinear propagation of light, as well as the diffraction effects, could be accounted for by the behavior of waves of short wave length.
		Since light energy will propagate between two points in space or from a source to a distant point in space, we may employ the light energy as a means of communication between the source and the distant point.
	www.dbugman.com /optics.html (1862 words)

	Ch 10 (Site not responding. Last check: 2007-11-04)
		These pulses propagate along the spring by displacing the particles of the spring in directions parallel to the direction the pulses are traveling.
		A longitudinal wave is one in which the displacement of particles of the medium is parallel to the direction of propagation of the wave.
		The propagation of electromagnetic waves in free space is dramatically illustrated by the transmission of information back to earth by space probes from the outer regions of our solar system.
	cougar.slvhs.slv.k12.ca.us /~pboomer/physicstextbook/ch10.html (6289 words)

	Optics
		Apparatus for illustrating the rectilinear propagation of the light
		Apparatus for illustrating the rectilinear propagation of the light, for the shadows and for Rumford’s photometer.
		For the rectilinear propagation and the obscura camera we use the candlestick, the cardboard disk and the screen.
	spazioinwind.libero.it /gabinetto_di_fisica/ottica/optics1.htm (1103 words)

	About Reference Systems (Site not responding. Last check: 2007-11-04)
		The rectilinear - uniform propagation of a quantum of light (C=1) in vacuo has a constant magnitude and does not depend on the source of radiation.
		The rectilinear - uniform motion of a quantum of light (C=1) is connected with Maxwell's classical electrodynamics.
		In such movement its area of contact with the vacuum is minimal and it is not capable of changing the uniformity of the vacuum.
	www.wbabin.net /physics/sadovnik9.htm (358 words)

	Glossary The Northwestern Virtual Physics Lab
		Diffraction, the deviation of light from rectilinear propagation, is a characteristic of wave phenomena which occurs when a portion of a wave front is obstructed in some way.
		When various portions of a wave front propagate past some obstacle, and interfere at a later point past the obstacle, the pattern formed is called a diffraction pattern.
		Each point on a propagating wave can be considered as the source of a small wave, or wavelet which propagates at the same speed as the original wave.
	www.physics.northwestern.edu /vpl/glossary.html (668 words)

	Grimaldi-2 (Site not responding. Last check: 2007-11-04)
		Shadows projected by opaque bodies illuminated by solar light or by point sources built in the laboratory lead to the conclusion that, in a transparent homogeneous medium, light propagates along straight lines (the law of rectilinear propagation).
		Propagation of light in the room would then take place along a cone "that shall be visible in the air if there be some dust or if some smoke is produced".
		1: AB is the hole from which light penetrates into the room: EF is the obstacle across the light cone; MN is the projected shadow, sensibly wider than that foreseen by the law of rectilinear propagation; IG and HL are the zones of penumbra, GH that of full darkness.
	www.scienzagiovane.unibo.it /English/scientists/grimaldi-2.html (495 words)

	"The Disturbing Influence of Solar Radiation On the Wireless Transmission of Energy" by Nikola Tesla (Site not responding. Last check: 2007-11-04)
		The rectilinear propagation would limit the action on the receiver to the extent of the horizon and entail interference of obstacles in a straight line joining the stations.
		The exact mode of propagation of the currents from the source and the laws governing the electrical movement had still to be ascertained.
		It is a well know fact that the action on a wireless receiver is appreciably weaker during the day than at night and this is attributed to the effect of sunlight on the elevated aerials, an explanation naturally suggested through an early observation of Heinrich Hertz.
	www.tfcbooks.com /tesla/wireless05.htm (1675 words)

	The law of geometric propagation (Site not responding. Last check: 2007-11-04)
		The light-rays propagate away from the source until they encounter an opaque object, at which point they stop.
		A light-ray is simply a line which runs perpendicular to the wave-fronts at all points along the path of the wave.
		This law is only valid in the limit where the wave-length of the wave is much smaller than the dimensions of any obstacles which the wave encounters.
	farside.ph.utexas.edu /teaching/302l/lectures/node108.html (279 words)

	What is a Pinhole Camera? [pinhole.cz]
		In one of its sides is a small hole which, via the rectilinear propagation of light, creates an image of the outside space on the opposite side of the box.
		In 10 AD the Arabian physicist and mathematician Ibn al-Haitham, known as Alhazen, studied the reverse image formed by a tiny hole and indicated the rectilinear propagation of light.
		As mentioned above, the image in the pinhole camera is created on the basis of the rectilinear propagation of light.
	www.pinhole.cz /en/pinholecameras/whatis.html (1155 words)

	Wave - Wikipedia, the free encyclopedia
		Transverse waves are those with vibrations perpendicular to the direction of the propagation of the wave; examples include waves on a string and electromagnetic waves.
		Longitudinal waves are those with vibrations parallel to the direction of the propagation of the wave; examples include most sound waves.
		Rectilinear propagation – the movement of waves in straight lines.
	en.wikipedia.org /wiki/Waves (1291 words)

	Sketching the History of Classical Electromagnetism (Site not responding. Last check: 2007-11-04)
		Robert Hooke (see also: Robert Hooke) (1635-1703) puts forth a wave theory of light in his Micrographia, considering light to be a very high speed rectilinear propagation of longitudinal vibrations of a medium in which individual wavelets spherically spread.
		He established, among many things, the connection between the speed of propagation of an electromagnetic wave and the speed of light, and establishing the theoretical understanding of light.
		Oliver Heaviside (1850-1925) writes Electromagnetic induction and its propagation over the course of two years, re-expressing Maxwell's results in 3 (complex) vector form, giving it much of its modern form and collecting together the basic set of equations from which electromagnetic theory may be derived (often called "Maxwell's equations").
	history.hyperjeff.net /electromagnetism (3147 words)

	Ch 12 (Site not responding. Last check: 2007-11-04)
		Newton experienced no difficulty in explaining the rectilinear propagation of light by means of his particle model.
		By the year 1865 he had developed a series of mathematical equations from which he predicted that all three are propagated in free space at the speed of light as electromagnetic disturbances.
		Before 1675 light propagation was generally considered to be instantaneous, although Galileo had suggested that a finite time was required for it to travel through space.
	cougar.slvhs.slv.k12.ca.us /~pboomer/physicstextbook/ch12.html (8151 words)

	Whatever happened to the Particle Theory of Light?
		He handles refraction by considering the detector embedded in the glass (a bit of a far-fetch!).
		Rectilinear propagation is the most interesting thing of all.
		He denies that light particles are constrained to move along straight lines, then he shows how neighboring non-rectilinear paths effectively cancel each other, making the straight paths the only real contribution of the light energy at the end.
	www.physicsforums.com /showthread.php?t=26314 (516 words)

	The origin of cosmic rays
		Thus, not until the very highest energies might one expect to have near rectilinear propagation and thereby a rather direct source identification.
		Although the flux is small it is important from the standpoint of searching for origin, in view of the rectilinear propagation of gamma rays.
		The gap is the transition region where neither the diffusion-mechanism nor rectilinear propagation is appropriate.
	www.europhysicsnews.com /full/12/article17/article17.html (3060 words)

	Melles Griot Optics Guide - Diffraction
		In all light beams, some energy is spread outside the region predicted by rectilinear propagation.
		This effect, known as diffraction, is a fundamental and inescapable physical phenomenon.
		Huygen's principle, illustrated in the image below, states that each point on a propagating wavefront is an emitter of secondary wavelets.
	www.mellesgriot.com /products/optics/fo_3_1.htm (947 words)

	Geometric Optics
		In geometric optics, light is assumed to travel in a definite direction with relatively little diffraction.
		The paths showing the direction of propagation of a light wave are called rays.
		The eye can see something only if a ray from the object reaches the eye.
	hypertextbook.com /physics/waves/optics (206 words)

	Physics 20 - Characteristics of Light
		The intensity of light radiating equally in all directions from a source varies inversely with the square of the distance between the source and the observer.
		Define the following terms: luminous, nonluminous, rectilinear propagation, beam, incandescence, ray, transparent, translucent, opaque, penumbra, umbra, eclipse.
		Give some examples which illustrate the rectilinear propagation of light.
	www.sasked.gov.sk.ca /docs/physics/u3a12phy.html (413 words)

	Course Descriptions
		They study the propagation of sound waves, sound emitters and receivers, and the physiological properties of sound.
		They develop awareness of the dangers of electricity, of the adequate measures of protection, and of the pollution caused by power plants.
		· Optics: students should understand the concept of rectilinear propagation of light and apply the laws of geometrical optics to reflection and refraction.
	www.ic.edu.lb /academics/secondary/physics/courses.htm (2248 words)

	Rejection of Pascal's Wager: Epistemology and Atheism
		These experiment and observations are based on some fundamental assumptions: such as the rectilinear propagation of light-in other words, that light travels in a straight line.
		These are all further based on another assumption: that in general if many people performing the same experiments all come up with the same results then it is unlikely that all of them have been delusional.
		Furthermore, it overthrew an assumption that was thought to be true prior to that: the assumption that there is an ether permeating space which allows electromagnetic waves to propagate (just like sea is the substance on which water waves propagate).
	www.geocities.com /paulntobin/baroque.html (1464 words)

	experiments
		Completion of a drawing, presumably related to the paper "On the action of a rectilinear electric oscillation upon a neighbouring circuit" for the Annalen der Physik und Chemie
		Experiments on rectilinear propagation and on reflection; letter to Helmholtz in which Hertz reports on his latest experiments
		Hertz sends off the paper "On the propagation of electric waves by means of wires" to the Annalen der Physik und Chemie
	www.hhi.de /english/gf/life/experiments/experiments.html (746 words)

	100 years of Einstein's SRT.
		The rectilinear - uniform motion of a quantum of light (c=1) is connected with
		different types of movement: rectilinear (quantum of light c=1)
		According to classical electrodynamics, an electron in rectilinear motion
	www.physicsforums.com /showthread.php?t=84183 (378 words)

	Quantum Amature 2000: QA Terminology
		A point of reference...we speak of "Going BACK into time or Forward into the future." The assumption that "time" does, in fact, go forward has served as the basis for all scientific/philosophical thought about the past/present/future.
		This assumption was based upon rectilinear propagation (light travels in straight lines) until Einstein and his theory proved otherwise (curved space means that it may just go round and round and that if we could wait long enough.......we just might meet ourselves someday!).
		The most widely accepted and supported model that explains the origin and evolution of the universe.
	members.tripod.com /QuantumAmature/QAterms.htm (1262 words)

	unit04-sect02-les17-lessona (Site not responding. Last check: 2007-11-04)
		Ask yourself the 3 questions above to determine which models they support:
		Rectilinear propagation - light travels in straight lines.
		Law of Reflection - the angle made by the reflected beam equals the angle made by the incident beam.
	www.cdli.ca /courses/phys2204/unit04/section02/lesson17/3-lesson-a.htm (695 words)

	The Alternative Science Physics Forum - A Bravenet.com Forum
		b) The rectilinear - uniform propagation of a quantum of light (c=1) in vacuo
		than the rectilinear motion of a quantum of light.
		For this reason physicists ascribe a huge frequency
	pub39.bravenet.com /forum/3320272813/fetch/486430 (360 words)

	TEL-Atomic - X-Ray Systems
		With the Basic System students can perform 19 x-ray detection experiments using photographic techniques and the Geiger-Muller tube.
		Properties of x-ray, such as rectilinear propagation, inverse square relationship, and penetration and absorption can be shown.
		With the Crystallography System all experiments in the Basic System can be performed plus 11 additional crystallography experiments.
	www.telatomic.com /telxo5.html (182 words)

	[No title]
		Interference of waves in 2 dimensions (know how to apply the three formulas)
		Be able to compare the two theories of Newton and Hugens with respect to reflection, diffraction, refraction, rectilinear propagation, dispersion, etc.....The question will involve filling in a table.
		Young's Double Slit experiment: questions and some theory.
	members.tripod.com /~aekoivu/waves-review.htm (1002 words)

	Light Notes
		Unlike other waves, doesn't require medium or matter in order to propagate
		Rectilinear Propagation: Imagine ball thrown with great speed, The path formed is essentially a straight line
		Q. Why can sound be heard around corner of obstruction but light not seen?
	members.aol.com /swayne/light.htm (923 words)

	wave propagation
		Can you see that the waves move in a direction that is perpendicular to the wave fronts.
		This is called rectilinear propagation or straight-line motion.
		Step 4: Make a copy of the graph by pressing the copy button in the graphWindow.
	www.lcse.umn.edu /specs/labs/wave_propagation.html (808 words)

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