Jawabanmu

2014-06-11T16:24:35+07:00
Dik = lamda = 200 m => 2.10² m
V= 3.10^8 m/s
Dit = f...?
Jwb = V= lamda.f
f= V:lamda
f= 3.10^8 m/s : 2.10² m
f= 15.10^5 /s => 15.10^5 Hz