Template:Potd/2011-01-24 (en)

Radiometer. The Crookes radiometer, also known as the light mill or solar engine, consists of an airtight glass bulb, containing a partial vacuum. Inside are a set of vanes which are mounted on a spindle. The vanes rotate when exposed to light.

 Template:Potd/2011-01-24

This is the English translation of the Picture of the day description page from 24 January 2011.

Radiometer. The Crookes radiometer, also known as the light mill or solar engine, consists of an airtight glass bulb, containing a partial vacuum. Inside are a set of vanes which are mounted on a spindle. The vanes rotate when exposed to light.

Descriptions in other languages:

• Potd/2011-01-24 (da)
• Potd/2011-01-24 (en)
• Potd/2011-01-24 (es)
• Potd/2011-01-24 (fr)
• Potd/2011-01-24 (hu)
• Potd/2011-01-24 (it)
• Potd/2011-01-24 (ja)
• Potd/2011-01-24 (ko)
• Potd/2011-01-24 (mk)
• Potd/2011-01-24 (nl)
• Potd/2011-01-24 (pl)
• Potd/2011-01-24 (pt)
• Potd/2011-01-24 (zh-hans)