Jawabanmu

2014-04-10T14:24:53+07:00
Ln = (2n - 1) lamda / 4 24 = (2.1 - 1) lamda / 4 = 1×lamda /4 lamda = 24×4 = 96 cm Ln = (2×3)×96 / 4 6×96/4 = 576/4= 188 cm :)