Right note, wrong information for physicist (8)
I believe the answer is:
roentgen
'for physicist' is the definition.
(Wilhelm Roentgen)
'right note wrong information' is the wordplay.
'right' becomes 'r' (common abbreviation).
'wrong' is an anagram indicator.
'information' becomes 'gen' (gen can informally mean information).
'note' anagrammed gives 'oent'.
'r'+'oent'+'gen'='ROENTGEN'
(Other definitions for roentgen that I've seen before include "X-ray discoverer" , "German physicist" , "Measure of radiation" , "Pioneer in radiation" .)