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CROOKES RADIOMETER: Single vane, Double vane
$ 35.00 – $ 35.30 excl. GST
- This Crookes Radiometer comprises a partially evacuated glass bulb containing 1x set of 4x mica vanes mounted on a pivot.
- For each vane 1x side is black, the other shiny. The presence of heat or light energy causes the vane to rotate.
(Note: Designed for demonstration purposes using a heat/light source to provide energy to rotate the vanes.
It wont necessarily spin if the sun is too high in the azimuth as its rays will not strike the vane at the correct angle to provide sufficient energy for them to rotate.)
CROOKES RADIOMETER: Single vane, Double vane
- This Crookes Radiometer comprises a partially evacuated glass bulb containing 1x set of 4x mica vanes mounted on a pivot.
- For each vane 1x side is black, the other shiny. The presence of heat or light energy causes the vane to rotate.
(Note: Designed for demonstration purposes using a heat/light source to provide energy to rotate the vanes.
It wont necessarily spin if the sun is too high in the azimuth as its rays will not strike the vane at the correct angle to provide sufficient energy for them to rotate.)
(Wikipedia excerpt: .."...The Crookes radiometer (also known as a light mill) consists of an airtight glass bulb containing a partial vacuum, with a set of vanes which are mounted on a spindle inside. The vanes rotate when exposed to light, with faster rotation for more intense light, providing a quantitative measurement of electromagnetic radiation intensity.
The reason for the rotation was a cause of much scientific debate in the ten years following the invention of the device,[1][2] but in 1879 the currently accepted explanation for the rotation was published.[3][4] Today the device is mainly used in physics education as a demonstration of a heat engine run by light energy...")
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