Riko

W potassium eV 0 ( ) = 2.25 , W caesium eV 0 ( ) = 2.14 , 7 1 5650 10 m − λ = × , 7 2 5180 10 m − λ = × 34 h J s 6.63 10 . − = × , 8 c m s = × 3 10 / W potassium eV 0 ( ) = 2.25 19 2.25 1.6 10 J − = × × 19 3.6 10 J − = × W caesium eV 0 ( ) = 2.14 19 2.14...