Crookes Radiometer - All Glass Glow In the Dark Test your lung capacity to

Test your lung capacity to learn about how your lungs work

Students will be enthralled learning about the first circumnavigation of the globe

For the awesome ending

wall-mounted Aero Clock

it is because tonight

Crookes Radiometer - All Glass Glow In the Dark Test your lung capacity toThe Crookes Radiometer or light mill was invented in 1873 by Sir William Crookes. Four vanes are suspended in a globe containing a partial vacuum. The vanes are black on one side, and white or silver on the other. The vanes turn when light hits them. The stronger the light is, the faster they will spin! Even after more than 140 years, there is still controversy about why the Radiometer spins. These elegant Radiometers are made entirely of blown glass.