JAMB - Physics (1995 - No. 22)
The wavelength of signals from a radio transmitter is 1500mm and the frequency is 200kHz. What is the wavelength for a transmitter operating at 100kHz?
7500m
300m
75m
15m
Giải thích
\(\lambda\)1F1 = \(\lambda\)2F2
1500 x 200000 = 1000000 x \(\lambda\)2
\(\lambda\)2 = 300m
1500 x 200000 = 1000000 x \(\lambda\)2
\(\lambda\)2 = 300m