Cool Videos

Newspaper Radiation!
Newspaper Radiation!

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
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
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...