Lovene for Lysets Forplantclse* 165 



» 



. 2t-2 >»r"„ . 



-4it®'(k^-u'')e'S 2t (2t-f-l)d Ji-d^ #(r*"2tW-ûr ^^ 



r" 



x" 

 * o 



Lîgnîngerne (363) give nu Betîngelseslîgnîngerne: 



=2|2td^' /(Xt(r)'-^'dr)j =P(r„] 



K[|.i:y("*..«^'"»o+ 



+-. 





ro 



X J2t(2t4-1) d^gd:^ (r*2t(r) '-^'dr)+ 



To 



■„-ty^^^^twc^^oiî^"' 



+, 



To 



i^yc'*+'*"2twd'-)j= 



ro 



