Welcome to Mayumi

The rotation speed changes with the intensity of light heat! Perfect for windowsill interior
Fun Science
Radiometer bulb type

The Fun Science series is a series where you can enjoy mysterious chemical changes and phenomena as interiors.
When illuminated by light heat, the four wings in the glass rotate.
If it is placed on a window, it will be sunlight, and if it is indoors, it will continue to rotate in response to incandescent lights. The speed of rotation changes in proportion to the intensity of light.
Originally a radiometer is an experimental device that was developed by the British physicist Crooks in the 1870s and converts solar energy into kinetic energy.
Does not respond to fluorescent lights. Reacts to sunlight and incandescent light.

Product size: height 160 x width 100 x depth 100mm
Material: Borosilicate glass, iron
Screw-in setup
In a tea cardboard box
* Does not respond to fluorescent lights. Reacts to sunlight and incandescent light.