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Topic: Velocity of light

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	VELOCITY OF LIGHT
		Because the detector could move at any relative velocity (within determined borders) in relation to the source there follows that there is always certain light that in relation to the detector’s inertial system has the speed c with which the detector interacts.
		The speed of light is directly dependent on the relative speed between the source and the observer, but the light is detectable only when its speed is equal to c, in the relation to the detector.
		Relative velocity of the light spectrum in its relation to the observer is equal to the vector related difference of the velocities of both, light spectrum and the observer in their relation to the referential system.*
	www.beotel.yu /~svetlost (2505 words)

	Speed of light -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-09-16)
		The speed of light through a medium (that is, not in vacuum) is less than c (defining the (The ratio of the velocity of light in a vacuum to that in a medium) refractive index of the medium).
		In passing through materials, light is slowed to less than c by the ratio called the (The ratio of the velocity of light in a vacuum to that in a medium) refractive index of the material.
		The constant speed of light is one of the fundamental Postulates (together with (The relation between causes and effects) causality and the equivalence of inertial frames) of special relativity.
	www.absoluteastronomy.com /encyclopedia/s/sp/speed_of_light.htm (4105 words)

	ipedia.com: Speed of light Article (Site not responding. Last check: 2007-09-16)
		At present, the speed of light is a definition, not a measurement, as the metre is defined in terms of the speed of light and not vice versa.
		Given that the speed of light is slower in an Optical fiber and that straight lines rarely occur in communications situations, a typical time as of 2004 for an Australia or Japan to US computer-to-computer ping is 0.250 seconds.
		The finite speed of light was not conclusively established by these observations, as it could be argued the differences in the times of eclipses were due to perturbations of the orbits of the satellites.
	www.ipedia.com /speed_of_light.html (2202 words)

	Is the Speed of Light Decreasing?
		For example, a modest 2-fold decrease in the velocity of light would result in a 4-fold decrease in the amount of matter, or amount of energy in the universe.
		Velocity of light for 114 of 120 selected values for the years from 1800 to 1983.
		A constant speed of light is a problem to young-earth creationism, since the nature of the creation (i.e., the large distances between galaxies) requires either an old universe (required for light from the oldest galaxies to travel to earth) or one that was made to deceive people into thinking it was old.
	www.godandscience.org /youngearth/speedlight.html (1068 words)

	The GPS and the Constant Velocity of Light
		Clearly, the velocity of light with respect to an observer resting on the Earth surface is c+v between N.Y. and S.F. and c-v between S.F. and N.Y. One must conclude that the velocity of light is c with respect to a frame at rest.
		Claiming that the velocity of light is c in a frame translating at velocity v, and simultaneously claiming that the velocity is c±v in a rotating frame, which is the same phenomenon, is incoherent.
		We must conclude that the hypothesis of a constant velocity of light with respect to a moving frame of reference is an illusion and therefore an error.
	www.newtonphysics.on.ca /Illusion (7715 words)

	Science of Maya
		He proves mathematically that the velocity of light is, so far as man's finite mind is concerned, the only constant of a universe in flux.
		In his famous equation outlining the equivalence of mass and energy, Einstein proved that the energy in any particle of matter is equal to its mass or weight multiplied by the square of the velocity of light The 'death' of matter has given birth to an Atomic Age.
		Light velocity is a mathematical standard or constant not because there is an absolute value in 1,86,300 miles a second, but because no material body, whose mass increases with its velocity, can ever attain the velocity of light.
	www.lifepositive.com /Spirit/Science_and_spirituality/Science_of_Maya12006.asp (983 words)

	light (Site not responding. Last check: 2007-09-16)
		In physics, the symbol for the velocity of light is "c".
		The velocity of light is constant in the sense that, unlike the velocity of moving objects, it is independent of the observer's inertial frame of reference, a perennially astonishing insight famously owed to Albert Einstein.
		The velocity of light also varies with the velocity of the medium through which it is traveling.
	www.sizes.com /natural/light.htm (310 words)

	The Impossibility of Measuring the Velocity of Light (Site not responding. Last check: 2007-09-16)
		The Impossibility of Measuring the Velocity of Light The idea that the velocity of light is the same no matter in what reference frame it is measured is fundamental to the modern sceince of physics.
		Since the conclusion that the velocity of light was constant in all reference frames is based on observation, the necessity of understanding the methodology of measuring the velocity of light should be apparent to all who would deal with relativistic phenomena.
		Any measurement of the velocity of light that we may care to make is actually a measurement of the velocity of light in terms of the velocity of light.
	www.pych-one.com /new-5651463-4394.html (1121 words)

	Velocity of Light
		One feature which made it costly and was thought to be in its favour, was that the light path was confined in an evacuated pipe 1.6km long to eliminated the effect of the refractive index of the air which reduces the velocity by about 0.03%.
		These measurements could be regarded as velocity of light determinations and after several small differences his final value agreed exactly with that obtained with cavity resonators.
		The outstanding success of the quartz clock and my velocity of light result, which was gradually confirmed by other workers and is, in fact, still the accepted value though now with smaller limits of error, gave me an international reputation and invitations to lecture and attend conferences throughout the world.
	www.btinternet.com /~time.lord/VelocityofLight.html (1879 words)

	Constancy of the Velocity of Light
		The possibility that the velocity of light, c, is not a fixed constant is reconsidered by statistical analysis of the historical measurements collected from four sources.
		The velocity of light data from four different sources are tabulated, edited, and analyzed to provide data sensitive enough to detect a decrease [in c] of the size claimed by Setterfield and Norman.
		By modifying the second postulate to state: "The observed velocity of light is c from all frames of reference," the radiation continuum model (RCM) of electromagnetic radiation is developed.
	www.ldolphin.org /constc.shtml (3909 words)

	Space Travel in Spaceships
		Light would be a constant in a vacuum, measured simply as a mathematical (c).
		But to countenance this argument, and place it in context, we have to first ascertain what we actually deal with when we delve lucidly inside the mechanics of light itself, for if science is to be believed, and many do not believe them, an appraisal of light needs to be understood.
		And we should also conclude, that the photon, which makes up light, itself is a massless particle, and therefore determine light cannot feasibly move anywhere, for if it did, its body would contain mass.
	members.madasafish.com /~newtheories/Beyond_Light_Speed_2.html (683 words)

	Invitation to Islam !
		The greatest speed C, denoting the velocity of light in vacuum, is hinted at in two glorious Quranic verses relating this fundamental universal contant C with the motion of the Earth-Moon system.
		"The velocity C of light in vacuum is the same in all inertial frames of reference in all directions and depend neither on the velocity of the source nor on the velocity of the observer".
		Let V is the measured average orbital velocity of the moon deduced from the average radius R of the lunar geocentric orbit tas measured from an orbiting earth during its heliocentric motion)
	islamway.com /english/images/library/nonmuslims/velocity.htm (2453 words)

	The Speed of Light
		The velocity of light plays a central role is astronomy and in physics.
		Thus, for example, light moves slower in glass than in air, and in both cases the speed is less than in a vacuum.
		Thus, when we see the light of very distant objects in the universe, we are actually seeing light emitted from them a long time ago: we see them literally as they were in the distant past.
	csep10.phys.utk.edu /guidry/violence/lightspeed.html (807 words)

	Velocity of light is relative
		If the box is moving, the lights emitted from the points A and B simultaneously, should arrive in the centre of the box at different times.
		That is, when the light beam B enters into box from behind, the other light beam A approximating from the opposite direction, enters the same box from the front.
		When the light entering from the front part of boxes reaches behind boxes, the lights entering from the back parts of boxes, have not reached their front parts yet.
	www.aliceinphysics.com /papers/introduction.html (2027 words)

	Radial Velocity and Light-Time Corrections
		SLALIB provides a number of routines for this purpose, allowing observations to be referred to the Earth's centre, the Sun, a Local Standard of Rest (either dynamical or kinematical), the centre of the Galaxy, and the mean motion of the Local Group.
		Radial velocity corrections to the dynamical LSR are produced by the routine sla_RVLSRD and to the adopted kinematical LSR by sla_RVLSRK.
		The radial velocity correction from the dynamical LSR to the Galactic centre can be obtained by calling sla_RVGALC.
	star-www.rl.ac.uk /star/docs/sun67.htx/node228.html (496 words)

	Anemometer, thermo anemometer, and other wind speed products for air velocity and wind measurement
		The CS-800 Anemometer, which measures air velocity, wind speed, humidity, temperature and light intensity is a marvelous and economical anemometer for use in the factory and in commercial and industrial buildings as well as laboratories for quick checking of ventilating fume hood and grill velocities, humidity, temperature and lighting levels.
		The CS-810 Anemometer, which measures air velocity and wind speed is a an economical anemometer for use in the factory and in commercial and industrial buildings as well as laboratories for quick checking of ventilating fume hood and grill velocities.
		The Series 471 Digital Thermo-Anemometermeasures air velocity in four selectable ranges and is a versatile dual function thermo-anemometer that quickly and easily measure air velocity in four selectable ranges - feet per minute or meters per second - plus air temperature in °F or °C. pumps
	www.clarksol.com /html/velocity.htm (200 words)

	SETI, the Velocity-of-Light Limitation, and the Alcubierre Warp Drive - UFO Evidence
		Although perhaps surprising to the nonspecialist, within the context of general relativity and vacuum-energy physics, such variability of the free space velocity of light c (as seen from a distant frame) under certain conditions has long been part of the literature.
		For the case of propagation near a massive body, for example, we have a reduction in the velocity of light by an amount proportional to the gravitational potential, a result first noted by Einstein himself.
		(5) For the case of propagation between closely spaced conducting boundaries as in discussions of the Casimir effect, we have an increase in the velocity of light which is associated with the reduction of vacuum fluctuation energy between the plates.
	www.ufoevidence.org /documents/doc1092.htm (1394 words)

	[ EEPI-Discuss ] SBC's "Project Lightspeed" TV Plans Running at Sub-Light Velocity (Site not responding. Last check: 2007-09-16)
		[ EEPI-Discuss ] SBC's "Project Lightspeed" TV Plans Running at Sub-Light Velocity
		Subject: [ EEPI-Discuss ] SBC's "Project Lightspeed" TV Plans Running at Sub-Light Velocity
		Next by thread: [ EEPI-Discuss ] The Grokster Decision: Chewing Gum For the Hole in the Dam
	www.eepi.org /archives/eepi-discuss/msg00121.html (198 words)

	► » VELOCITY OF LIGHT IS AN ILLUSION (Site not responding. Last check: 2007-09-16)
		LIGHT is a change of this rate of change of the potential
		is the velocity of light, any particle at a distance from the
		velocity of light.Time is required for the energy transfer to
	www.science-one.org /VELOCITY-OF-LIGHT-IS-AN-ILLUSION-7329096.html (242 words)

	Undergraduate Teaching Lab Information: Velocity of Light - P41 Version
		The students measure the velocity of light by two totally different methods:
		Direct measurement of the velocity of propagation of a light wave emitted by a laser diode.
		This is done by emitting a light wave which is amplitude- modulated at a high frequency and measuring the phase change of the modulation as a function of distance.
	www.dartmouth.edu /~physics/labs/descriptions/velocity.light.p41.html (171 words)

	Phase velocity (from light) -- Encyclopædia Britannica (Site not responding. Last check: 2007-09-16)
		General considerations > Basic concepts of wave theory > General characteristics of waves > Phase velocity
		; i.e., with a velocity b of the wavelength divided by the period or the temporal frequency divided by the spatial frequency,
		(2)The velocity b is called the phase velocity because the phase angle
	www.britannica.com /eb/article-69260?tocId=69260 (80 words)

	Light Albums and CDs
		The Light at the End of the Tunnel (disc 1)
		The Light at the End of the Tunnel (disc 2)
		The Soul of the Rainbow and the Harmony of Light
	www.brainymusic.com /albumlink/l/light.html (333 words)

	Speed of Light (Site not responding. Last check: 2007-09-16)
		He carefully timed the motions of the moons in their orbits.
		In order to get a consistent picture from the measurements, he needed to account for the time it takes the light to get from Jupiter to Earth, which varies according to how far away Jupiter is away.
		(But this gives a pretty crude measurement of the speed of light, since the distance to Jupiter was not well known.)
	zebu.uoregon.edu /~soper/Light/speedoflight.html (103 words)

	Light, Velocity of · Astrological definition of Light, Velocity of · Astrology Encyclopedia
		Light, Velocity of · Astrological definition of Light, Velocity of · Astrology Encyclopedia
		Light, Velocity of · Astrological definition of Light, Velocity of · Astrology Encyclopedia · November 1, 2005, 19:59 GMT
		Correction of Mean to Sidereal Time ·; Transit · Transit of a planet across the Sun ·; Transitor · Translation of Light · Transmutation · Trigon · Trigonocrators · Trimorion · Trine · Trinities · Triplicities · Tropical Signs · Tropical Year · True Solar Day · Trutine · Twilight
	www.astrologyweekly.com /dictionary/velocity-of-light.php (529 words)

	Encyclopedia of Laser Physics and Technology - vacuum noise, velocity of light, vertical cavity surface-emitting lasers
		Encyclopedia of Laser Physics and Technology - vacuum noise, velocity of light, vertical cavity surface-emitting lasers
		You can get the required html code here.
		vacuum velocity of light → velocity of light
	www.rp-photonics.com /encyclopedia_v.html (149 words)

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