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Related Concept Videos

Bessel Function of Order Zero01:20

Bessel Function of Order Zero

A common physical example of wave propagation with radial symmetry is the ripple formed when a stone is dropped into a still pond. The disturbance originates at a central point and travels outward as a circular wave. As the radius of the wavefront increases, the same initial energy is distributed along a progressively larger circumference. Consequently, the amplitude, or height, of the wave decreases with distance from the center. This decay behavior cannot be captured by simple sine or cosine...
The de Broglie Wavelength02:32

The de Broglie Wavelength

In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
Principle of Linear Impulse and Momentum for a Single Particle01:20

Principle of Linear Impulse and Momentum for a Single Particle

Linear momentum is a fundamental concept in physics that describes the motion of an object. It is a vector quantity, having a magnitude equal to the product of its mass and its velocity, and direction along the object's velocity. On the other hand, linear impulse, also known as momentum impulse, is a concept in physics related to the change in the linear momentum of an object. Impulse is a vector quantity defined as the product of force and the time over which the force is applied.
Delving into...
Motion Of A Charged Particle In A Magnetic Field01:22

Motion Of A Charged Particle In A Magnetic Field

A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move perpendicular to it. If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of motion, a charged particle follows a curved path. The particle continues to follow this curved path until it forms a complete circle. Another way to look at this is that the...
Deflection of a Beam01:19

Deflection of a Beam

Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...
Principle of Linear Impulse and Momentum for a Single Particle: Problem Solving01:23

Principle of Linear Impulse and Momentum for a Single Particle: Problem Solving

Consider a wooden box and a cylinder of known masses m1 and m2, respectively, hanging from a ceiling with the help of a massless pulley system.

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Related Experiment Video

Updated: Jun 22, 2026

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
13:02

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

Published on: February 27, 2016

Transverse particle dynamics in a Bessel beam.

Graham Milne, Kishan Dholakia, David McGloin

    Optics Express
    |June 25, 2009
    PubMed
    Summary

    This study explores how silica microspheres move in a Bessel beam optical field. Both computational models and experiments reveal distinct, size-dependent particle behaviors for sorting applications.

    Area of Science:

    • Optical physics
    • Microparticle manipulation
    • Dielectric particle sorting

    Background:

    • Spatially periodic optical fields enable sorting of microscopic dielectric particles.
    • Particle sorting can be based on size, shape, or refractive index.

    Purpose of the Study:

    • To elucidate the behavior of silica microspheres in a Bessel beam optical field.
    • To compare Mie scattering and geometrical ray optics models for particle dynamics.
    • To experimentally verify predicted particle behaviors.

    Main Methods:

    • Theoretical analysis using Mie scattering and geometrical ray optics models.
    • Experimental observation of silica microsphere movement in a Bessel beam.
    • Comparison of computational predictions with experimental data.

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    Image-based Lagrangian Particle Tracking in Bed-load Experiments
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    Image-based Lagrangian Particle Tracking in Bed-load Experiments

    Published on: July 20, 2017

    Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
    11:51

    Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

    Published on: February 22, 2018

    Related Experiment Videos

    Last Updated: Jun 22, 2026

    Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
    13:02

    Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

    Published on: February 27, 2016

    Image-based Lagrangian Particle Tracking in Bed-load Experiments
    10:32

    Image-based Lagrangian Particle Tracking in Bed-load Experiments

    Published on: July 20, 2017

    Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
    11:51

    Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

    Published on: February 22, 2018

    Main Results:

    • Both computational models predict distinct, size-dependent phases of particle behavior.
    • Good qualitative agreement was found between the two computational models.
    • Experimental observations confirmed the predicted individual behavioral phases.

    Conclusions:

    • Bessel beams can be used to sort silica microspheres based on their size.
    • Theoretical models accurately predict particle behavior in optical fields.
    • Experimental verification validates the proposed sorting mechanism.