xUmp.com Logo

Hand-blown Glass Radiometer 3 inch - Image One
Share this product:

Hand-blown Glass Radiometer 3 inch

Item#: 16153  
List Price:$59.99
Sale 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: SAVETEN

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!


Periodic Table Lamp.


Periodic Table Lamp

Illuminate both your room and your mind with this ingenious Periodic Table Lamp.

Konus Academy Microscope 1000X.


Konus Academy Microscope 1000X

Heavy-duty microscope for high-school and college biology labs. Magnification of up to 1000X.

The Original Hoberman Sphere.


The Original Hoberman Sphere

The Hoberman Sphere expands and contracts with a magical motion so fluid and simple that kids can't help but play with it for hours.

Y-Ball Magnetic Puzzle.


Y-Ball Magnetic Puzzle

The Y-Ball Magnetic Puzzle is the perfect creativity tool for innovators, artists, engineers, writers, students, and you!

Green Laser Pointer.


Green Laser Pointer

Use this laser pointer for any professional presentation!

Kilovoltron Van de Graaff Generator.


Kilovoltron Van de Graaff Generator

This smaller transportable Van de Graaff Generator will easily fit in any classroom!

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