Misc: In 1888 Frits---------- , inventor of phase-contrast microscope (Nobel 1953) ?

Questions

Which Argentinian in 1967 became the oldest-ever winner of the Open Golf Championship at the age of 44?

Which Apostle didn't believe in the resurrection until he had seen the Saviour's wounds?

Name the lead singer and principal songwriter of the American group "The Doors"?

What did the Romans call the tenth part of a legion - between 300 and 600 men?

Which US President won the Nobel Peace Prize in 1919 for securing the League of Nations covenant at Versailles?