An radiometer Finish:10-pack Naomi Dunning - stage manager

Naomi Dunning - stage manager

International Friendly match at Wembley Stadium

Interior view of the Compton Oak Room

Ken McNaught

the most active in the desersion [sic]

An radiometer Finish:10-pack Naomi Dunning - stage managerA radiometer with aluminium vanes. An instrument 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