crookes radiometer การใช้

• EB states that Crookes Radiometer rotates the direction it does because of pressure differences.
• The Crookes radiometer turns when the MFP is larger than the size of the vanes.
• Crookes was the inventor of the Crookes radiometer, which today is made and sold as a novelty item.
• :The " fan " ( Crookes radiometer ) seems to work on something completely different from the solar sail.
• Ernest Fox Nichols used a modified Crookes radiometer in an attempt to detect infrared radiation from Arcturus and Vega, but Nichols deemed the results inconclusive.
• Thermal transpiration appears as an important correction in the readings of vapor pressure thermometers, and the effect is historically famous as being an explanation for the rotation of the Crookes radiometer.
• *given'only primary resource applications are discussed here'it is odd that the Crookes radiometer gets a mention given that'no practical application has been found for this device'
• *There is a very crude device the Crookes radiometer that does so weakly in a thin atmosphere, but I am thinking there ought to be some way to greatly improve its power.
• He soon discovered the phenomenon which drives the movement in a Crookes radiometer, in which a set of vanes, each blackened on one side and polished on the other, rotate when exposed to radiant energy.
• Two years later, researches on " Charcoal Vacua " with James Dewar led him to see the true dynamical explanation of the Crookes radiometer in the large mean free path of the molecule of the highly rarefied air.
• The pressure is very feeble, but can be detected by allowing the radiation to fall upon a delicately poised vane of reflective metal in a Nichols radiometer ( this should not be confused with the Crookes radiometer, whose characteristic motion is " not " caused by radiation pressure but by impacting gas molecules ).