Credit: © The Royal Society
    Image number: RS.8489
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    ca. 1875
    Object type
    Archive reference number
    Content object
    Glass radiometer containing a spindle, with aluminium vanes attached and a dark base. In a partial vacuum, the rotor spins when the vanes are exposed to light.

    The radiometer was designed by Crookes to measure the mechanical effect of radiant energy. Originally intended to illustrate his papers on 'Repulsion resultion from radiation [...]' published in a the Philosophical Transactions of the Royal Society between 1875-78.

    Sir William Crookes (1832–1919), British chemist and science journalist was elected a Fellow of the Royal Society in 1863 and served as its President between 1913-1915.
    Object history
    Presented to the Royal Society by William Crookes in 1911.
    Related fellows
    William Crookes (1832 - 1919, British) , Knight Chemist, Chemist
    Associated place
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          > United Kingdom
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