xUmp.com Logo

Back To School Science Supplies Sale
Back To School Science Supplies Sale
Hand-blown Glass Radiometer 3 inch - Image One
Share this product:

Hand-blown Glass Radiometer 3 inch

Item#: 16153  
List Price:$59.99
Our Price: $39.95 /each
You Save: $20.04 (33%)
DISCONTINUED This item is not available at the moment. Contact us for product availability update.

Save additional 10% OFF with coupon code: BTS2018

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!


  • Elegant design, hand-blown glass
  • Uses heat transfer to spin
  • No batteries required; the radiometer is powered entirely by light
  • Either solar or indoor light works
  • Great desk toy
  • Great for solar science lessons

16 +
Box Size:
11.50 x 4.75 x 4.75 inches
29.21cm x 12.07cm x 12.07cm
0 lb 7 oz
0.20 kg

Customer Reviews

There are no customer reviews for this product. Be the first one to write one!


Snap Circuits Jr. .


Snap Circuits Jr.

Build over 100 exciting electronic projects with this easy to use kit!

Jr. Scientist Mini Electric Guitar Kit.


Jr. Scientist Mini Electric Guitar Kit

With this cool electronic kit you get to assemble your own mini electric guitar!

Physics Workshop Kit.


Physics Workshop Kit

This science kit is an essential introduction to physics knowledge!

Human Anatomy Model - Small 10 in.


Human Anatomy Model - Small 10 in

This 10 inch realistic model has removable organs that can be studied and set back into the correct position!

CHEM C500 Chemistry Set v2.0.


CHEM C500 Chemistry Set v2.0

Get this great introductory chemistry kit for your favorite young scientist!

Newtons Cradle - Regular - 5.5 inches.


Newtons Cradle - Regular - 5.5 inches

This classic desk toy will keep you amused!

xUmp.com Logo

Join our tribe:


Sign-up for our weekly discounts and promotions email newsletter.

xUmp.com Catalog


View xUmp science supplies catalog

xUmp.com Mission