xUmp.com Logo

Solar Radiometer - Image One
Share this product:

Solar Radiometer

by Tedco   Item#: 10094   5 star rating 7 customer reviews
List Price:$19.99
Deal Price: $14.99 /each
You Save: $5.00 (25%)
SOLD OUT Check back in 5 to 10 days to order this item.

Save additional 10% OFF with coupon code: HELLO2019

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 causing the wings to spin faster. It spins under the solar light or a regular light bulb. Great for science projects, as a gift or as a desk amusement!

Features:

  • 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


Age:
8 +
Box Size:
5.25 x 3.25 x 3.25 inches
13.34cm x 8.26cm x 8.26cm
Weight:
0 lb 3 oz
0.08 kg

Customer Reviews


5 star rating  Great gift
Alicia Flaherty from U.S.A, Colorado, Fountain
Works just like it's supposed to. Looks nice, and I know my brother will love this. Bought this for him to replace the one he had as a child that was stolen. So happy that these are still popular enough to be sold.

5 star rating  directly observable interesting physics
Mark ODell from USA, CA, Los Angeles
Motion directly from light never gets old. This motion, however, is not due to photon momentum radiation pressure, or the direct pressure from gas warmed by the black faces. Such simple explanations turn out to be wrong. This is a light-driven heat engine. Even James Clerk Maxwell initially disagreed with Osborne Reynolds about the mechanism, so we are in good company watching and wondering. See Wikipedia Radiometer references for a lucid discussion, but know there is much more going on than the common explanations most of us learned when first seeing a Crookes Radiometer ("light-mill"). Cooling causes direction reversal. Improving the vacuum stops motion altogether. Radiation pressure is real, but the effect is too small here. The important mechanism has more in common with the flow of heat or superfluid helium than the momentum of photons or the pressure of bulk hot gas. The black sides do get hotter, but the ultimate magic of motion apparently happens at the edges of the vanes, not the faces.

5 star rating  Good Classroom Tool
Cynthia from USA, UT, Draper
This is an awesome way for students to learn that solar radiation is a form of energy.

5 star rating  Radiometer fun
Maria from Cedar Rapids, IA
Love to watch this work and think about the science behind it. Great tool for teaching about energy.

5 star rating  Great Conversation Piece!
Eric Holmes from Moose Jaw, Canada
Everyone that sees it will stop and look at it rotating and then will have a theory on what makes it rotate.

5 star rating  SolarRadiometer
Joan from Tulsa, Oklahoma
This is so fun. I broke my mother's radiometer, so had to replace it. A good price for a great product.

5 star rating  

intriguing, fun


FEATURED PRODUCTS

Y-Ball Magnetic Puzzle.

$29.99

Y-Ball Magnetic Puzzle

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

Brush Robot 4M Kit.

$15.99

Brush Robot 4M Kit

Get swept away by this fantastic robot kit that uses vibrations to move!

Red Pi T-Shirt.

$18

Red Pi T-Shirt

NEW 2016 DESIGN! This hip red tee features Pi to 1000 decimal places on an ultra soft 100% cotton shirt.

Fuel Cell X7 Kit.

$125

Fuel Cell X7 Kit

Build a model car that runs on hydrogen gas using a unique reversible fuel cell!

Sea Monkeys Ocean Zoo.

$13

Sea Monkeys Ocean Zoo

Use this cool Sea Monkeys zooquarium to teach your child how to take care of a pet!

Genetics & DNA Kit.

$34.99

Genetics & DNA Kit

Head into the lab for an in-depth investigation of genetics and DNA!

xUmp.com Logo


Join our tribe:

SIGN-UP & SAVE

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



xUmp.com Catalog

CATALOG

View xUmp science supplies catalog

xUmp.com Mission