A gorgeous, fully-functional, hand-blown glass radiometer. Also known as the "ight mill" or "solar engine," the solar radiometer demonstrates with simple physics how light can be transformed into energy. Its invention in1873 is credited to Sir William Crookes, an English physicist. The black and polished vanes are suspended in the semi-vacuum created inside the radiometer. 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, as air pressure builds and raises the temperature of the air molecules on the black side, causing the wings to spin faster. It spins under natural light of the sun, or a strong light concentrated upon it. Great for science projects, as a gift for a physics instructor, student, or enthusiast, or as an elegant conversation piece for your desk!
With 23 hands-on experiments, you can investigate specific weather phenomena as well as the climate system in general.
Heavy-duty microscope for high-school and college biology labs. Magnification of up to 1000X.
Create currents and discover gravity while exploring the theory of Lenz's Law with this kit!
This microscope is so versatile you can even take it with you on a job site!
Build your very own smart robot!
The Y-Ball Magnetic Puzzle is the perfect creativity tool for innovators, artists, engineers, writers, students, and you!