E(in ev) = 12400 / ( in Ao) E = 12400 / 5400 = 2.296 ev E= 2.296 * 1.6*10-19 J power = energy / time 15 = n E /t (n/t) = 15 /( 2.296 * 1.6 * 10-19) = 4.08 * 1019 Solution E(in ev) = 12400 / ( in Ao) E = 12400 / 5400 = 2.296 ev E= 2.296 * 1.6*10-19 J power = energy / time 15 = n E /t (n/t) = 15 /( 2.296 * 1.6 * 10-19) = 4.08 * 1019.