inverse-square law

in·verse-square law

(ĭn′vûrs-skwâr′)n. The principle in physics that the effect of certain forces, such as light, sound, and gravity, on an object varies by the inverse square of the distance between the object and the source of the force. For example, an object placed three feet away from a light source will receive only one ninth ( ¹/_3² , the inverse of 3 squared) as much illumination as an object placed one foot from the light.

inverse-square law

A principle in physics dealing with forces that spread equally in all directions (such as sound, light, and gravity) and describing how the strength of these forces weakens over increasing distance. According to this principle, the effect of the force on an object changes by the inverse square of the distance between the object and the force's source. For example, an object placed three feet away from a light source will receive only one-ninth (1/3², the inverse of 3 squared) as much illumination as an object placed one foot from the light.

inverse-square law

[′in‚vərs ¦skwer ‚lȯ] (physics) Any law in which a physical quantity varies with distance from a source inversely as the square of that distance.

inverse-square law

inverse-square law A law which applies to a light source (or to a sound source) that is in a space far away from any reflecting surface: the intensity at a point, as measured on a surface which is perpendicular to a line drawn between the point and the source, varies inversely with the square of the distance between the point and the source. (For sound waves, this decrease in intensity is equivalent to a drop in sound-pressure level of 6 dB for each doubling of distance from the source.)

inverse-square law

The intensity of radiation or light at any distance is inversely proportional to the square of the distance between the irradiated surface and a point source. Thus, a light with a certain intensity at a 4-ft distance will have only one-fourth that intensity at 8 ft and would be four times as intense at a 2-ft distance. See also: law

in·verse-square law

(in-vĕrs' skwār law) A rule relating to radiation stating that intensity of radiation is inversely proportional to the square of the distance from radiation source to irradiated surface.

单词	inverse-square law
释义	inverse-square law in·verse-square law (ĭn′vûrs-skwâr′)n. The principle in physics that the effect of certain forces, such as light, sound, and gravity, on an object varies by the inverse square of the distance between the object and the source of the force. For example, an object placed three feet away from a light source will receive only one ninth ( ¹/_3² , the inverse of 3 squared) as much illumination as an object placed one foot from the light. inverse-square law A principle in physics dealing with forces that spread equally in all directions (such as sound, light, and gravity) and describing how the strength of these forces weakens over increasing distance. According to this principle, the effect of the force on an object changes by the inverse square of the distance between the object and the force's source. For example, an object placed three feet away from a light source will receive only one-ninth (1/3², the inverse of 3 squared) as much illumination as an object placed one foot from the light. inverse-square law inverse-square law [′in‚vərs ¦skwer ‚lȯ] (physics) Any law in which a physical quantity varies with distance from a source inversely as the square of that distance. inverse-square law inverse-square law A law which applies to a light source (or to a sound source) that is in a space far away from any reflecting surface: the intensity at a point, as measured on a surface which is perpendicular to a line drawn between the point and the source, varies inversely with the square of the distance between the point and the source. (For sound waves, this decrease in intensity is equivalent to a drop in sound-pressure level of 6 dB for each doubling of distance from the source.) inverse-square law inverse-square law The intensity of radiation or light at any distance is inversely proportional to the square of the distance between the irradiated surface and a point source. Thus, a light with a certain intensity at a 4-ft distance will have only one-fourth that intensity at 8 ft and would be four times as intense at a 2-ft distance. See also: law in·verse-square law (in-vĕrs' skwār law) A rule relating to radiation stating that intensity of radiation is inversely proportional to the square of the distance from radiation source to irradiated surface. LegalSeelaw
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