John Ashworth Ratcliffe CB CBE FRS was an influential British radio physicist.
John Ashworth Ratcliffe, FRS © National Portrait Gallery, London
Maurice Wilkes (right) with the Meccano differential analyser in the Cambridge University Mathematics Laboratory, c. 1937. A. F. Devonshire (left) co-authored a number of papers on melting and disorder with the Laboratory's first director, John Lennard-Jones. The winner of the 1937 Mayhew Prize, J. Corner, is operating the input table (centre).