This simple device gives a graphic demonstration of the sun’s radiative energy. A large convex mirror concentrates solar radiation onto a small container of water suspended at the mirror’s focal point. In a few minutes, the water boils.

The mirror’s angle is adjustable though 180° to allow it to be aimed at the sun at any time of day.

Specifications
Mirror Diameter: 30cm
Aperture area: 700cm2
Mirror focal length: 16cm
Furnace capacity: 20ml
Base diameter: 22cm
Height: 33 - 45cm
Weight: 480g