Lovene for Lysets Forplantelse. 115 



(320) r^ ilr^f,(rx ) = q. ^i^vo^Å^o) = »(^o), 



rå) ^r^ f„(rao )=^ r«d,/,,0-o) = ^n nic(yet liden Stör- 

 relsc n(^^)) eller liijj IVuI. 



Liguiiigcrne (317) give da, naar man Lcuiaerkcr al: 

 u' = u']/^ ; u" = H")/:^i, 



e= -'-f k^l.(r'o) --^'(e+d(r",))+*^^.[(kH2H=)(h (r'«) 

 ->(..'„))4-2e]+i^' e-(e+.I(.."J+^::Hp") 

 e,= if 'd(r"„)+îf^ .(!&^)_d(r'V)> 

 e,= Ü^d(..'„)+!|5e(l^_d(r'„)), 

 (S„=_i^^'k^g(r'V)-îf (e+d(r'„))+*-^' .{(k^+2„'^)(8 (r''„) 



-fn(r"„))+2i]+1f e(e+d(r'„)+2Ä>). 



Af Ligningen (292) eiLoKles da, naar disse Værdier 

 substilucrcs: 



(322) s^— a,li2s2_j_p,s24-^,— 5„ fcH^^/^^+(°^''^4-«'"'')^''""^ 



hvor: 



„ = î^fa(r'„) _i^.(h(r'„)-lm(r'„)) + 



ß, =-if (c + d (..'„))_lf '(c+d(."„) + 



+!:^<c+d(r',)+ ''-'(-;>-*-') +lf'e<c+d(r^)+3rL(-^"-^-+)3 

 »6'^^'c(e+d(r'„)+d(r"„))-'^;55'c(c+d(.-"„)) 



Y/= 



(e+d(r',)+1::!ii:^^)-i^=;^' e d (r%) (^^- d(r'.,)) 



