Conversation so far:
what happened with Rosalind and Cambridge?
Franklin went to Newnham College, Cambridge in 1938 and studied chemistry within the Natural Sciences Tripos.
did he graduate?
In 1941, she was awarded second-class honours from her final exams.
what happened to her during WW II?
CANNOTANSWER.
what did she do after Cambridge?
joined the physical chemistry laboratory of the University of Cambridge to work under Ronald Norrish, who later won the Nobel Prize in Chemistry.

Question: what did she work on in the laboratory?
Self-contained rewrite: What did Rosalind Franklin work on in the physical chemistry laboratory of the University of Cambridge?