Group photograph by Hills and Saunders, including Ernest Rutherford (1871-1937), Watson and Sir John Cockcroft (1897-1967). Rutherford discovered alpha, beta and gamma rays in radiation and worked with Hans Geiger (1882-1945) on alpha particles. Cockcroft later said 'We were living in the Golden Age of physics, so rapidly did discoveries come along'. Dimensions: 240mm x 290mm.
© Science Museum / Science & Society Picture Library