Possible Clues:

• One floored having constant interruption ‹ his?
• Max - - , German winner of Nobel prize for physics in 1918
• German physicist giving name to a constant
• German physicist locating carbon in timber
• Some would say he was a physicist
• Scientist (with a constant to his name)
• German theoretical physicist and Nobel Prize winner
• Physicist making audible contribution to a raft of policies
• Third element of 'uncertainty principle' gripped German physicist
• Max of physics