# Cool Videos

Radiation is the transfer of thermal energy using electromangetic waves, which includes visible light, infrared radiation, ultraviolet radiation, x-rays and microwaves and radio waves. A camera flash is designed to give off a whole lot of visible light in a...

##### DIY: Erasing With Heat

The thermochromic ink used in erasable pens has a unique quality; it changes color with temperature. The molecules in the ink are oriented in layers, and when light passes through, the wavelength with the greatest constructive interference is reflected back....

##### DIY: Baby Plasma Cutter

Pencil lead and some batteries make a small plasma cutter that is used to etch a pattern in aluminum foil. In this simple but cool demo, you are able to observe how a high velocity ionized gas (plasma) conducts electricity...

##### Newton's Eye Poke Experiment

Repeat a classic experiment from the master himself, Isaac Newton. In 1666 Newton first performed the Eye Poke experiment, writing about it much later in his book OPTICKS. He used this experiment to support his theory that light was composed...

##### Can the Frictional Force Between Two Interleaved Phone Books Lift A Car?

Students often underestimate the force of friction, despite the fact that friction is the force that acts every day to bring their school buses and cars to a stop. In this video, two phone books are interwoven page- by-page and...

##### Tesla’s Million Volt Revenge

On October 8th, 2012, magician David Blaine performed a seemingly life-threatening stunt subjecting himself to a whopping one million volts of electricity while wearing a 20-pound chain metal suit. The public was shocked by the performance, a demonstration that seems...

##### Vortex Rings in Nature and Your Physics Classroom!

You've probably seen a smoker blow smoke rings or you've created whirlpools in your tub or pool when you were little. These phenomena are known as Vortices, formed when a fluid swirls around a central point because of a complex...

##### The Amazing Water Slide Human Projectile

The Amazing Water Slide: How it was done German engineer Bruno Kammerl, created the human projectile video clip that accumulated more than 1.4 million views worldwide. As luck would have it, I was in Europe when this hit the internet...