κ( λ )= λ 4π a( λ ) MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiabeQ7aRnaabmaaba Gaeq4UdWgacaGLOaGaayzkaaGaeyypa0ZaaSaaaeaacqaH7oaBaeaa caaI0aacdaGae8hWdahaaiaadggadaqadaqaaiabeU7aSbGaayjkai aawMcaaaaa@43AF@
where a(λ) is the spectral linear absorption coefficient
unit : 1