Dr. Mulhall's Speed of Light Experiment

January 23, 2018

Before stepping into a physics lab full of complex equipment, it's important to know proper procedure. At least, that's what physics and electrical engineering professor, Declan Mulhall, Ph.D., thinks!

What is an oscilloscope and how do you make it work? Dr. Mulhall conducts an experiment measuring the speed of light while demonstrating the proper way to use an oscilloscope, a device that displays and analyzes the waveform of electric signals. Watch as he measures the instantaneous signal voltage as a function of time, all while giving a step-by-step tutorial on the basics of the oscilloscope. So, how fast is the speed of an electric signal in a coaxial cable? Watch and find out! Just because you can't see it, doesn't mean it's not light!

Watch the full video here
(Note - the sidebar has links to each experiment, and most of them have youtube videos!)

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