Radiometers and otheoscopes Anonymous
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Radiometers and otheoscopes
Radiometers and otheoscopes, instruments designed for measuring the mechanical effect of radiant energy. Mounted in a partial vacuum, the central rotor spins when the vanes are exposed to light. Chemist William Crookes (1832-1919) initially believed the vanes with black surfaces were pushed around by pressure from light radiation. This was incorrect and other theories were put forward. It was not until 1879 that Osborne Reynolds suggested the correct explanation, warmer molecules striking the edge of the vanes obliquely with a higher force than the colder molecules.
ca. 1875
- Image reference: RS-8490
- The Royal Society
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More by the artist Anonymous.
Explore the collections Scientific instruments diagrams, art and prints, Vintage, antique physics prints.
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We use a 240gsm fine art paper and premium branded inks to create the perfect reproduction.
Our expertise and use of high-quality materials means that our print colours are independently verified to last between 100 and 200 years.
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Manufactured in the UK
All products are printed in the UK, using the latest digital presses and a giclée printmaking process.
We only use premium branded inks, and colours are independently verified to last between 100 and 200 years.
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We print everything to order so delivery times may vary but all unframed prints are despatched within 2-4 days via courier or recorded mail.
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