What developer of the Bragg–Gray cavity theory was knighted in 1920?
William Henry Bragg
Title: Bragg–Gray cavity theory
Passage: According to the Bragg–Gray cavity theory, the ionization produced in a small cavity within an irradiated medium or object is related to the energy absorbed in that medium as a result of its radiation exposure.  It was developed in 1936 by British scientists Louis Harold Gray, William Henry Bragg, and William Lawrence Bragg.
Title: William Henry Bragg
Passage: Sir William Henry Bragg (2 July 1862 – 12 March 1942) was a British physicist, chemist, mathematician and active sportsman who uniquely shared a Nobel Prize with his son William Lawrence Bragg – the 1915 Nobel Prize in Physics: ""for their services in the analysis of crystal structure by means of X-rays"".  The mineral Braggite is named after him and his son.  He was knighted in 1920.
Title: Jubie Bragg
Passage: Jubie Barton Bragg (February 17, 1876 – November 26, 1947) was an American football coach.  He served the first head football coach at Florida A&M University in Tallahassee, Florida.  Bragg coached the team off and on from 1907 through 1931 and has also served as head coach of Alabama's Talladega College, leading that school to shared black college football national championships in 1920 and 1921.  Bragg compiled a record of 4–18–1 as Florida A&M's head coach.  His son, Eugene J. Bragg, later coached the team himself.  Bragg was a member of Alpha Phi Alpha fraternity and a charter member of Alpha's Beta Nu chapter on the campus of Florida A&M.
William Henry Bragg Bragg–Gray cavity theory