The Physics of Loudspeakers @QuantumBoffin

Uploaded April 2010 | Updated September 2026, 35 minutes ago

The Physics of the moving coil loudspeaker is explained and it is demonstrated how a simple speaker can be made using a neodynium magnet, a coil of wire and a plastic drinks bottle.

$Telescopes An explanation of the basic physics of refracting telescopes. The video also shows how a simple telescope may be made using two lenses and some cardboard tubing.$

Starting a Fire using a Parabolic Mirror

Adding Trendlines to Science Graphs in Excel: Part 1

Simple Graph Plotting on Excel (Energy Resource data)

$Snells law of Refraction$