Spherical Wave
Spherical Wave - Related Videos
01:23
Spherical Coordinates
0 Views •
2023
Spherical coordinate systems are preferred over Cartesian, polar, or cylindrical coordinates for systems with spherical symmetry. For example, to describe the surface of a sphere, Cartesian coordinates require all three coordinates. On the other hand, the spherical coordinate system requires only one parameter: the sphere's radius. As a result, the complicated mathematical calculations become simple. Spherical coordinates are used in science and engineering applications like electric and...
10:52
Reconstitution of Basic Mitotic Spindles in Spherical Emulsion Droplets
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Cited by 19 •
2016
The assembly and positioning of the mitotic spindle depend on the combined forces generated by microtubule dynamics, motor proteins and cross-linkers. Here we present our recently developed methods in which the geometrical confinement of spherical emulsion droplets is used for the bottom-up reconstitution of basic mitotic spindles.
09:32
Standing Waves
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2023
Source: Arianna Brown, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Standing waves, or stationary waves, are waves that appear not to propagate and are produced by the interference of two waves traveling in opposite directions with the same frequency and amplitude. These waves appear to vibrate up and down with no linear movement and are most easily identified in vibrating finite media like a plucked guitar string,...
02:12
The Wave Nature of Light
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2020
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion. Others in the...
01:27
Gravity between Spherical Bodies
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2025
Newton's law of gravitation describes the gravitational force between any two point masses. However, for extended spherical objects like the Earth, the Moon, and other planets, the law holds with an assumption that masses of spherical objects are concentrated at their respective centers. This assumption can be proved easily by showing that the expression for gravitational potential energy between a hollow sphere of mass (M) and a point mass (m) is the same as it would be for a pair of extended...
FAQs
In an ideal, lossless medium, the same outward-propagating energy is distributed across a spherical surface whose area increases with the square of its radius. Consequently, intensity falls as distance from the source increases, following an inverse-square relationship. This provides a quantitative baseline for predicting how strongly a localized sound or radiation source is observed at different distances.
Phase-front geometry makes radial distance the central coordinate in a spherical-wave analysis. Measurements taken at different radii can be compared on corresponding spherical surfaces, allowing changes in field strength to be interpreted as propagation and geometric spreading rather than unrelated spatial variation. This organization is especially useful for three-dimensional fields generated by compact sources.
Inverse-square behavior is a benchmark, not a universal measurement rule. The relationship applies to an ideal, lossless medium, where geometric spreading accounts for the intensity change. Comparing observations with this benchmark helps researchers determine whether a measured field follows the ideal spherical-wave model or whether the assumptions used to describe propagation are no longer adequate.
Near-field and far-field behavior mark different regimes in how a wave field is interpreted relative to its source. A spherical-wave description remains useful across this transition because it preserves the source-centered geometry while researchers examine how propagation changes with distance. Recognizing the transition helps organize measurements and clarify which aspects of the field depend most strongly on source proximity.
A practical workflow begins by identifying whether the field comes from a localized or compact source. The analyst then uses source-centered spherical geometry, examines how intensity changes with radial distance, and compares that change with the inverse-square expectation for an ideal lossless medium. Finally, the near-field to far-field transition and relevant wave phenomena can be considered.
Spherical-wave models connect a common geometric framework to several physical settings. They can represent sound from localized emitters, radiation from compact sources, and wave fields in optics and acoustics. Using the same framework across these domains lets researchers track how three-dimensional spreading affects observations while adapting the interpretation to the specific type of field being studied.
Beyond propagation strength, spherical waves provide a basis for studying spatial wave phenomena. Their fields can be analyzed in relation to interference, diffraction, and source localization, each of which depends on how the wave varies through space. In physics research, this makes the model useful not only for estimating intensity, but also for interpreting spatial patterns and locating their generating source.