Science Gift Crookes Radiometer Solar Toy Glass Light Mill for Home Décor

This is brand new unused item with defects. this is hand made product. Please note that the finish on some of the vanes is chipped off, and become the black dirts attached to the glass surface.but it won't impact working at all, those who care please be cautious to buy.
 
The whole structure of this light mill is made of glass Bulb ， 4 colors available, please choose the color that you need.

Diameter is appr. 7cm, Standing tall is appr. 14cm With colorful base,
it is an attractive windowsill ornament Crookes radiometer is a gift for students to spark their interest to learn physics and excite their imagination,  Please note that the finish on some of the vanes is chipped off. but it won't impact working and the whole look.

It works under the sun or with a laser pointer(not included) It has 4 vanes, when the sun or even incandescent light or a laser hits the vane, it starts rotating. It is a good experiment of solar energy converting into mechanical energy.

Maybe you have to consider how light, heat and air pressure are related!

Package includes:1 piece