Wooden Radiometer

New
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£40.00

In stock

Delivery details

Description

Also known as the light mill or solar engine, the solar radiometer demonstrates with simple physics and movement how light can be transformed into energy. Its invention in 1873 is credited to Sir William Crookes, an English physicist. The black and polished vanes are suspended in the semi-vacuum created inside the radiometer. When exposed to a warm light source, such as the sun or a lamp, the vanes spin. The more powerful the light source the faster the vanes will spin. The black side of the vane absorbs the light faster than the polished side. Air pressure builds and raises the temperature on the back side of the vane causing the spinning motion. Please note that radiometers are hand-made and will vary slightly in size and colour.

Product Details
  • Product Code: 442428
  • Product Dimensions: Base 6 x 6 x 2.5cm. Radiometer 10 x 8cm.
Delivery & Returns
  • Standard UK Mainland Delivery - £4.95
  • UK Offshore Delivery - £12.95
  • Next Day UK Deliveries - £8.00 (Please note that this is next working day, with deliveries made Monday to Friday, excluding public holidays.)
  • EU Deliveries - £19.95
  • International Delivery - We regret that we do not currently deliver to addresses outside the EU

Pre-orders:
If you pre-order an item, the item will be sent to you as soon as it becomes available and you'll receive an email to let you know it's on its way.

Read our full delivery policy here.

UK returns are free - find out more about our returns policy.

Last order dates for Christmas

We want your orders to arrive in time for Christmas, so we recommended ordering your gifts before these dates:

•    Standard UK Mainland delivery: 12pm Monday 18 December 
•    Next Working Day delivery: 12pm Wednesday 20 December (signed for) 
•    EU delivery: 12pm Tuesday 12 December

There will be no despatches between the following dates:

•    Saturday 23rd December - Tuesday 26th December
•    Friday 29th December - Monday 1st January

 

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