▁obtain ing ▁his ▁doctor ate . ▁At ▁University ▁of ▁W roc ław ▁in ▁the ▁Otto ▁L um mer ’ s ▁team ▁Wolf ke ▁worked ▁at ▁the ▁general ization ▁of ▁the ▁Ab be ’ s ▁theory ▁of ▁optical ▁imag ing ▁for ▁non - linear ▁grat ings . ▁In ▁ 1 9 1 0 ▁he ▁obtained ▁degree ▁of ▁Doctor ▁of ▁Philosoph y ▁( Ph D ) ▁for ▁dis sert ation ▁about ▁the ▁resol ving ▁power ▁of ▁optical ▁systems ▁on ▁example ▁of ▁mic ros cope . ▁Despite ▁many ▁great ▁scientific ▁achiev ements ▁in ▁his ▁later ▁years , ▁Mie cz ys ław ▁Wolf ke ▁jud ged ▁its ▁content ▁the ▁most ▁valuable . ▁ ▁During ▁the ▁stay ▁in ▁Zur ich ▁Mie cz ys ław ▁Wolf ke ▁was ▁a ▁member ▁of ▁a ▁narrow ▁group ▁of ▁phys ic ists ▁who ▁created ▁the ▁paths ▁of ▁the ▁world ▁physics . ▁In ▁ 1 9 1 6 ▁he ▁started ▁to ▁study ▁subject ▁of ▁An ode ▁ray s ▁and ▁– ▁in ▁ 1 9 1 7 ▁– ▁mel ting ▁of ▁t ung sten ▁( t ogether ▁with ▁G m ür ▁e ▁CO ▁company ) ▁and ▁also ▁on ▁mer cur y ▁Rect ifiers . ▁One ▁year ▁later ▁his ▁interests ▁changed ▁to ▁carbon ▁l amps , ▁t ung sten ▁sm el ting ▁and ▁nit ro gen ▁comb ust ion . ▁At ▁this ▁time ▁he ▁published ▁also ▁dis sert ation ▁" Ü ber ▁die ▁M öglich keit ▁der ▁opt ischen ▁Abb ild ung ▁von ▁M ole k ular git tern " ▁– ▁( About ▁a ▁possibility ▁of