An economical smoke chamber and light-sheet microscope system for experiments in fluid dynamics and electrostatics

Author:

Stephan Karl D.1ORCID

Affiliation:

1. Ingram School of Engineering, Texas State University , San Marcos, Texas 78666

Abstract

A smoke chamber and light-sheet video microscope setup is relatively easy to construct and provides opportunities for undergraduates to participate in a variety of advanced experiments, including the demonstration of Brownian motion and the interaction of induced electrostatic dipoles in aerosol particle agglomeration. We present results of these experiments along with information to allow replication of the setup in undergraduate physics laboratories. A theoretical model of the rate of aerosol agglomeration of long dipole chains as a function of electric field agrees with experiments at field strengths up to 200 kV m−1.

Funder

Julian Schwinger Foundation

Publisher

American Association of Physics Teachers (AAPT)

Subject

General Physics and Astronomy

Reference17 articles.

1. E. Wennstrom , “ Development of a Brownian motion experiment for an undergraduate laboratory course,” B.S. thesis ( Oregon State University, Corvallis, OR, 2021).

2. Differential dynamic microscopy to characterize Brownian motion and bacteria motility;Am. J. Phys.,2016

3. Brownian motion of a trapped microsphere ion;Am. J. Phys.,2014

4. The light-sheet microscopy revolution;J. Opt.,2018

5. The structure and electrification of smoke particles;Proc. R. Soc. London, Ser. A,1929

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