Clear Glass Solar Radiometer - Measures Radiant Flux of Electromagnetic Radiation

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Clear Glass Solar Radiometer - Measures Radiant Flux of Electromagnetic Radiation

Crookes radiometer - a curiously retro scientific instrument for measuring light

A sealed glass case with 4 vanes that magically spin when a light source is present

No batteries required - runs on pure science (or magic!)

Kit out your office in Dumbledore or Steampunk style

Hand blown glass replica scientific instrument

Measures 15cm /6" tall

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