radiometer tedco toys sphere sun powered dark light colors light transfers heat different degree reflection absorption strong light more energy spin faster blown glass ages 14+ decor home office science

Radiometer (Tedco)

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Experience this sphere powered by the sun! The vanes in the Radiometer alternate in dark and light colors. When the light strikes these vanes it transfers heat to each one, but not at the same degree. The lighter vane reflects the rays and the darker vane absorbs the rays. The stronger the light, the more energy there is, causing the vanes to spin faster.

  • Made of blown glass.
  • For ages 14+