Levitating Particles (IMAGE)

University of Texas at Austin

Levitating Particles

Caption

A 5-micrometer glass bead levitated in air by a single laser beam from below. This optical trap is formed by the balance between the scattering force from the laser beam and the gravitational force on the bead. Tongcang Li, et. al. used a similar optical trap to study the Brownian motion of a trapped bead in air with ultra-high resolution. Their paper is published in Science.

Credit

Tongcang Li, the University of Texas at Austin

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