Crookes Radiometer: Momentum Transfer Explained

  • Context: Undergrad 
  • Thread starter Thread starter cragar
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SUMMARY

The Crookes Radiometer operates on the principle of momentum transfer from photons to the vanes. When photons strike the black side of the vane, they are absorbed, while the white side reflects them, resulting in unequal momentum transfer. This differential momentum causes the vanes to rotate. For a comprehensive understanding, refer to the detailed explanation available on the Wikipedia page for the Crookes Radiometer.

PREREQUISITES
  • Understanding of photon behavior and momentum transfer
  • Basic knowledge of thermodynamics principles
  • Familiarity with the concept of reflection and absorption of light
  • Awareness of the design and function of the Crookes Radiometer
NEXT STEPS
  • Research the physics of photon momentum and its implications
  • Explore thermodynamic principles related to heat transfer
  • Study the design variations of Crookes Radiometers
  • Investigate practical applications of momentum transfer in other devices
USEFUL FOR

Physics students, educators, and anyone interested in the principles of light behavior and energy transfer mechanisms.

cragar
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Does it start turning because when the photon hits the little flag it transfers its momentum?
And because one side will absorb and one side reflects, the momentum transfer will be different so it will turn.
 
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