The vanes, or wings, in this solar radiometer are alternately dark and light in color. When the light strikes these wings it transfers heat to each one - but not at the same degree. The lighter wing reflects the rays and the darker wing absorbs. The stronger the light, the more energy there is to heat up the darker side of the wing causing the wings to spin faster. It spins under the solar light or a regular light bulb. Great for science projects, as a gift or as a desk amusement!
Get this great introductory chemistry kit for your favorite young scientist!
You don’t think recycling is cool? Get a look at this, we’re sure you’ll change your mind!
This project book and sample kit introduces you to shape-memory alloy technology!
This glass Erlenmeyer mug makes an excellent gift!
The Ball of Whacks is the perfect creativity tool for innovators, artists, engineers, writers, students, and you!
A beautiful desk or bookshelf accessory for the reading fanatic in your family!