Andre Koch Torres Assis is a professor of Physics at the University of Campinas in Brazil, who has been studying the history of electricity and electrodynamics for more than thirty years. As part of his research, he has assembled put together a collection of experiments that demonstrate some of the earliest experiences that natural philosophers had with electricity - and which show how poorly understood these phenomena still are today, more than two hundred years after they were first observed.

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ANDRE'S EARLIER APPEARANCES ON THE PODCAST:

DemystifySci #328 https://www.youtube.com/watch?v=upV3ZfCEISA

DemystifySci #233 https://youtu.be/kGHNKORQZK8

DemystifySci #204 https://youtu.be/VGql2qiRjkY

ANDRE'S TALK at DEMYSTICON: https://youtu.be/bboKmG0uUuU?si=c1ctpVpecjzIRhMK

ANDRE'S HOMEPAGE: https://www.ifi.unicamp.br/~assis

00:00 Go!

00:07:02 Experiment Demonstration: The Amber Effect

00:17:06 The oldest instrument to study electricity

00:24:00 Exploring Repulsion in Electricity with the Electric Pendulum

00:30:00 Understanding Electrical Charge Interaction

00:34:00 Historical Experiments and Discoveries in Electricity

00:39:00 Levitation Experiment and Its Significance

00:45:00 Du Fay’s Two Kinds of Electricity Discovery

00:52:00 The Electroscope and Key Findings

01:02:04 Introduction to Insulators and Conductors

01:07:01 Discovery of Conductors and Insulators by Gray

01:14:24 Classification Experiment with Various Materials

01:21:22 Conductivity Results of Various Materials

01:26:58 Understanding Electricity Control Through Conductors and Insulators

01:30:48 Material Variability and Conductivity Insights

01:31:17 Conductive Properties of Materials

01:36:00 Voltage Behavior of Materials

01:41:00 Role of Water and Conductivity

01:49:00 Mysteries of Charge Generation

01:51:22 English Translation of Coulomb’s Memoirs

01:57:00 Experimental Insights into Electricity

01:57:48 Exploration of Electron Dynamics

02:04:08 Insights into Electrification Theories

02:10:53 Reflections on Physics Definitions

02:15:54 Material Experimentations and Historical Context

02:18:34 Advancements in Charge Distribution Studies

02:21:47 Limitations of Experimental Accessibility

02:22:27 Importance of Hands-On Physics Education

02:28:01 Mysteries of Electricity

02:30:06 Collaborative Physics Discourse

02:34:34 Historical Context of Discoveries

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Contact and Frictional Electrification

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