Sir William Henry Bragg (2 July 1862 – 10 March 1942) He invented the X-ray spectrometer and with his son, William Lawrence Bragg, founded the new science of X-ray analysis of crystal structure. Their volume, X-Rays and Crystal Structure (1915), had reached a fifth edition 10 years later.
Sir Owen Willans Richardson (26 April 1879 - 15 February 1959) He researched the photoelectric effect, the gyromagnetic effect, the emission of electrons by chemical reactions, soft X-rays, and the spectrum of hydrogen.
Sir James Chadwick(20 October 1891 – 24 July 1974) In 1932, he made a fundamental discovery in the domain of nuclear science: he discovered the particle in the nucleus of an atom that became known as the neutron because it has no electric charge.
Sir Edward Victor Appleton(6 September 1892 – 21 April 1965) Nobel prize for his investigations of the physics of the upper atmosphere especially for the discovery of the so-called Appleton layer.
Sir Nevill Francis Mott(30 September 1905 – 8 August 1996) His accomplishments include explaining theoretically the effect of light on a photographic emulsion (see latent image) and outlining the transition of substances from metallic to nonmetallic states (Mott transition)