PERSON@1 -LRB- February NUMBER@1 , NUMBER@2 -- January NUMBER@3 , NUMBER@4 -RRB- was a MISC@1 physicist who clarified and expanded the electromagnetic theory of light that had been put forth by PERSON@2 .

PERSON@1 -LRB- February NUMBER@1 , NUMBER@2 - January NUMBER@3 , NUMBER@4 -RRB- was a MISC@1 physicist .
