Simplify the following text for a Grade 10 native English-speaking person.
Original: Brian David Josephson , FRS ( born 4 January 1940 ; Cardiff , Wales ) is a Welsh physicist who became a Nobel laureate in 1973 .
Simplified: Brian David Josephson , FRS ( born 4 January 1940 ; Cardiff , Wales ) is a Welsh physicist . He became a Nobel Prize laureate in 1973 for the prediction of the eponymous Josephson effect .