Transmission of electromagnetic waves from a plasma globe to a light emitting diode

Abstract

When introducing students to the topic of energy transported by the electromagnetic field, it is sometimes helpful if both the transmission and reception of signals can be visualized. Here the use of a plasma globe as transmitter and light emitting diode as receiver is described, and how this setup may be used to initiate discussions on central topics of electromagnetic wave propagation.

Human electrical circuits: interactive learning with plasma ball

“…Comprising a spherical glass filled with noble gases like neon or argon at a fraction of atmospheric pressure, central electrodes within the ball generate an arc voltage reaching up to 10 kV with a frequency around 20 kHz, ionizing the gas [1]. Some applications of the plasma ball in education has already been reported like instructing several electromagnetism concepts, such as demonstrating the transmission of electromagnetic waves emitted by the plasma [2], illustrating phenomena like breakdown and electrical discharge, exploring the intensity of electric fields [3], and delving into the principles of electromagnetic induction [4]. This article explores the educational uses of the plasma ball, * Author to whom any correspondence should be addressed.…”