Related Experiment Video
Updated: Jul 12, 2026

Safe Experimentation in Optical Levitation of Charged Droplets Using Remote Labs
Published on: January 10, 2019
Optical levitation of liquid drops by radiation pressure
Abstract:
Charged and neutral liquid drops in the diameter range from 1 to 40 microns can be stably levitated and manipulated with laser beams. The levitation technique has been extended toward smaller particles (about 1 micron), lower laser power (less than 1 milliwatt), and deeper traps (greater than ten times the particle's weight). The techniques developed here have particular importance in cloud physics, aerosol science, fluid dynamics, and optics. The interactions of the drops with light, the electric field, the surrounding gas, and one another can be observed with high precision.
Related Concept Videos
Rise of Liquid in a Capillary Tube
Excess Pressure Inside a Drop and a Bubble
Accelerating Fluids
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
Surface Tension of Fluid
Surface tension varies with...
Momentum And Radiation Pressure

