Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

Topic: Inverse-square

    Note: these results are not from the primary (high quality) database.

inverse square law of illumination is: a law relating the intensity of electromagnetic radiation, or other wave, radiating from a point source to the inverse square of the distance from that source. www.pha.jhu.edu /~ggaspar/physics/glossary/glossary/ii/insqlill.htm   (56 words)

Inverse-square law - Wikipedia, the free encyclopedia The density of flux lines is inversely proportional to the square of the distance from the source because the surface area of a sphere increases with the square of the radius. In physics, an inverse-square law is any physical law stating that some physical quantity or strength is inversely proportional to the square of the distance from the source of that physical quantity. The intensity of light radiating from a point source (energy per unit of area perpendicular to the source) is inversely proportional to the square of the distance from the source. en.wikipedia.org /wiki/Inverse-square_law   (612 words)

SQUARE ONE : Inverse Square Law It states that the intensity of light per unit area is inversely proportional to the square of the distance from the source (essentially the radius). The inverse square law defines the relationship between the irradiance or illuminance from a point source and distance. The inverse square law is only truly valid in cases where the light approximates a point source. www.squ1.com /light/inverse-square-law.html   (414 words)

The Apple, the Moon, and the Inverse Square Law The inverse square law proposed by Newton suggests that the force of gravity acting between any two objects is inversely proportional to the square of the separation distance between the object's centers. The inverse square relation between the force of gravity and the distance of separation provided sufficient evidence for Newton's explanation of why gravity can be credited as the cause of both the falling apple's acceleration and the orbiting moon's acceleration. This mathematical relationship is sometimes referred to as an inverse square law since one quantity depends inversely upon the square of the other quantity. www.glenbrook.k12.il.us /gbssci/phys/Class/circles/u6l3b.html   (1763 words)

INVERSE SQUARE LAW is inversely proportional to the square of the The Inverse Square Law teaches us that for every doubling of the distance from the sound source in a free field situation, the sound intensity will diminish by 6 decibels. In real life situations however, rooms bounded by walls, floors and ceilings will interrupt the inverse square law at a distance in tan average 30' square room at approximately 10-12 feet from the sound source. www.acousticalsurfaces.com /acoustic_IOI/101_5.htm   (246 words)

Inverse Square Law with Light Description: A light meter and a 25 W bulb are used to illustrate the inverse square law. www.unm.edu /~physics/demo/html_demo_pages/6B1020.html   (17 words)

"The Inverse Square Law:Other Applications including Radio Wave Propagation." The inverse square law applies to gravity and all phenomena wherein the effect from a localized source spreads uniformly throughout the surrounding space. The inverse square law holds not only for gravity, but for the electric field about an isolated electron, light (like from a match or from a light bulb), radiation (like from a piece of uranium), and sound (like from a cricket or from you). The inverse square law for gravity says the effect form a localized source spreads uniformly throughout the surrounding space (It is: Force= Gm1*m2/d^2. home.inu.net /davidstua/INV_SQ.HTM   (958 words)

The inverse-square law Figure 8.1: Illustration of the inverse-square law: all the light trough the 1 square-foot first area goes through the second one, which is 100 times larger, hence the light intensity per square foot is 100 times smaller in the second area. Since the area of a sphere increases as the square of the radius, the second sphere will accommodate 100 times the number of squares on the first sphere, that is, 100 million squares (all 1 square foot in area). Now, since all the light from the star goes through both spheres, the amount of light going through one little square in the inner sphere must be spread out among 100 similar squares on the outer sphere. phyun5.ucr.edu /~wudka/Physics7/Notes_www/node105.html   (283 words)

Astronomical Photometry (Lab 6) Inverse Square Law The relationship between the luminosity and the apparent brightness is given by the inverse square law of light. It turns out that it is easy to quantify the fall off in intensity with distance because the falloff follows a universal law called the inverse square law. Second, we will discuss properties of stars that can be learned by using the inverse square law. www.unm.edu /~astro1/101lab/lab6/lab6_A.html   (723 words)

The myth of Newton's apple, did Hipparchus discover Newtons gravity and inverse square law? The inverse square dependence on the distance comes from the assumption that the attraction is propagated along rays emanating from the surfaces of the bodies. It remains to inquire, whether the ancients knew the law by which gravity acts upon the celestial bodies; that it was in an inverse proportion of their quantity of matter, and the square of their distance. A dynamical theory of planetary motions based on the attractions of the planets toward the Sun by a force proportional to the inverse square of the distance between planet and Sun was his contribution. www.mlahanas.de /Greeks/HipparchusGraviation.htm   (1637 words)

Exploratorium: Science Snacks: Inverse Square Law Since the area increases as the square of the distance, the intensity of the light must decrease as the inverse square of the distance. The number of points of light is proportional to the inverse square of the distance: it follows the inverse-square law as explained above. Hold the second square different distances from the bulb and record the number of points of light that fall in the square. www.exploratorium.edu /snacks/inverse_square_law.html   (813 words)

Paradoxes Resolved, Origins Illuminated - The inverse square law For studying whether the force law is inverse linear or inverse square, it is reasonable to adopt target body masses in the huge range wherein their back-acceleration on the source mass is utterly negligible and unobservable. Thus, an inverse square flux cannot be the "effective cause" of gravity. Then, the only problem with the inverse square law is its algebraic inconsistency about which we can agree to disagree, i.e. www.metaresearch.org /msgboard/topic.asp?TOPIC_ID=395   (4877 words)

Prove or conversely disprove the inverse square law. However this graph goes no way to prove that it is inversely proportional to the square of the distance, for that we need to construct a graph with one over the square root of the radiation count plotted against distance. Thus it is shown that Gamma radiation obeys the inverse square law. The fact that light and gamma radiation obey the inverse square law is solid proof that all members of the electromagnetic spectrum will obey the inverse square law. www.coursework.info /i/48668.html   (1106 words)

Inverse-Square Law and Artificial Lights The inverse square law states that the intensity of radiation is inversely proportional to the square of the distance from its source. A one candela light source produces one lumen of light on an area of one square foot at a radius of one foot. If a one-watt light source is illuminating an area of one square centimeter at a distance of one meter, the intensity of light is 1 watt/SQ.CM. www.imagesco.com /articles/space/05.html   (380 words)

Inverse Square Law Square Law It falls in inverse proportion to the square of the relative distance. With larger distances, however, the inverse square law gives a sufficiently accurate approximation for most practical purposes, at least within the bounds of a specified solid angle. The increase in surface area is proportional to the square of the radius. www.schorsch.com /kbase/glossary/inverse_square_law.html   (181 words)

Inverse square law states that the radiation dose decreases with the square of the distance from a radiation source. the square of the distance from the source. This follows from the law of conservation of energy, because the flux of radiation through a spherical surface imagined around a radiation source has to be constant (no energy is created or lost outside the source). www.amershamhealth.com /medcyclopaedia/Volume%20I/inverse%20square%20law.html   (104 words)

Inverse Square Law---Procedure The inverse square law is a relationship between the brightness of a light and distance from the light. Calculate the inverse square law predictions for the distances you measured; the table on your worksheet explains how to do this. Read the disscussion of the inverse square law. cosmology.berkeley.edu /Education/IU/Summer99/DTS/ISQ/Procedure.html   (194 words)

inverse square Law When the square is placed one half the distance to the light source the shadow si sen to be four times greater. A hand held square is held up to the poster and is seen to be one quarter square. DESCRIPTION: A poster of four equal squares is placed against the wall and a light source is positioned in the middle of the room. www.physics.brown.edu /physics/demopages/Demo/optics/demo/6b1010.htm   (91 words)

The Fraud of the Inverse Square Law He then proceeded to formulate a more general law, based on a unified conception of force between two charges, in effect combining the static force law (the inverse square law; also known as Coulomb's law) with the force from the motion of the charges (also known as the magnetic force). The assertion of the inverse square law, first for gravitation by Newton and about a hundred years later for electric charges, was not just wrong--it was a deliberate fraud. For a decade, Ampere's work, including his highly disturbing discovery that force between current elements does not obey a simple inverse square law, was either ridiculed or ignored. members.tripod.com /~american_almanac/inverse.htm   (3852 words)

γ Ray Inverse Square Law When the radioactive source is confined so that it acts as a point source, the diminution in the number of photons incident on a given area is such that the intensity is inversely proportional to the square of its distance from the source. Sources #3 and #4 (square aluminum holders) are reasonably strong sources (0.52mCi and 1.21mCi as of 1/1/95; half-life is 5.26yr) and should be kept in the cylindrical lead shield when not in use. For the demonstration, it is held by a lab clamp/stand on the lecture bench. www.fas.harvard.edu /~scdiroff/lds/QuantumRelativity/GammaRayInverseSquareLaw/GammaRayInverseSquareLaw.html   (291 words)

Educator's Guide to The Inverse Square Law Actually, all of these questions can be answered through a very simple mathematical relationship known as the inverse square law. As the distance from the Sun increases the surface area of the sphere grows by the square of the distance. The relationship can be expressed most simply as: 1/d^2 (one over the distance squared) where d = distance as compared to Earth's distance from the Sun (for our first examples). www.solarviews.com /eng/edu/invsquar.htm   (1477 words)

The Inverse-Square Law The basic procedure for our laboratory test of the inverse-square law is shown in the diagram below. If the last two columns of each row are equal, allowing for experimental error, then the inverse-square law passes the test. Because the area of a sphere increases as the square of its radius, it's the square of D which appears in the denominator. www.ifa.hawaii.edu /users/barnes/ASTR110L_F03/inversesquare.html   (2459 words)

The Hutchinson Dictionary of Science: inverse square law@ HighBeam Research In physics, the statement that the magnitude of an effect (usually a force) at a point is inversely proportional to the square of the distance... The Hutchinson Dictionary of Science: inverse square law@ HighBeam Research www.highbeam.com /library/doc0.asp?DOCID=1P1:28914645&refid=ip_encyclopedia_hf   (118 words)

Students: Math: Inverse square law The inverse square law applies to light as well, as you will see with the following simple demonstration. Cut a square out of the center of one sheet of graph paper and cardboard no more than 1 inch on a side. Count the number of squares on the card that are illuminated. www.gelighting.com /na/home_lighting/gela/students/math_inverse.htm   (436 words)

JREF Forums OLD - READ ONLY - Inverse square law If one is going to apply the inverse square law to something like a focused beam one has to determine where a virtual focus of the beam would be and use that location as the source from which to do the calculations. The mention of the inverse square law gave me pause as well, but I am not as educated as others are to be able to properly express my concern. The inverse square law is pretty much a red herring in this context; if we had evidence that prayer worked (inverse square or not), that would trump our theories about inverse squares. www.randi.org /vbulletin/showthread.php?s=3f62785deb327bd2a55fdaf5819f687b&postid=1870727428   (3190 words)

inverse square law one of several laws relating two quantities such that one quantity varies inversely as the square of the other, as the law that the illumination produced on a screen by a point source varies inversely as the square of the distance of the screen from the source. www.factmonster.com /ipd/A0495503.html   (72 words)

Experiment #1: The Inverse Squares According to the inverse square law, when the distance is doubled from 8 cm to 16 cm the reading should decrease to 1/4 its initial reading. With this information, we also know that the inverse square law applies accurately only when the distance from the source is several times greater than the diameter of the detector. Do your data calculations agree with the inverse square? www.lbl.gov /abc/experiments/Experiment1.html   (425 words)

BIRMINGHAM GRAVITATION GROUP. We are planning a test of the inverse square law using our Spherical Superconducting Torsion balance for which we have received a PPARC grant. However the problems associated with convincing tests of the inverse square law at short ranges are many-fold. There is great interest in the possibility that Newton’s inverse square law of gravitation may break down at particle separations of much less than 1mm. www.sr.bham.ac.uk /gravity/rh,c,4.html   (423 words)

inverse square law states: that a quantity decreases as the square of some relevant distance. is exemplified: by Newton's law of gravitation and Coulomb's law: www.pha.jhu.edu /~ggaspar/physics/glossary/glossary/ii/invrsqlw.htm   (22 words)

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.