1-9
Thus, for a sine wave with a frequency of 1,000,000 hertz (1 megahertz), the wavelength would be
300 meters, as shown below:
The higher the frequency, the shorter the wavelength of a sine wave. This important relationship
between frequency and wavelength is illustrated in table 1-1.
Table 1-1.—Radio frequency versus wavelength
FREQUENCY
WAVELENGTH
METRIC
U.S.
300,000 MHz
.001 m
.04 in
EHF-
30,000 MHz
.01 m
.39 in
SHF-
3,000 MHz
.1 m
3.94 in
UHF--
300 MHz
1 m
39.37 in
VHF---
30 MHz
10 m
10.93 yd
HF----
3 MHz
100 m
109.4 yd
MF----
300 kHz
1 km
.62 mi
LF----
30 kHz
10 km
6.2 mi
VLF-----
3 kHz
100 km
62 mi
Q-9. What is the instantaneous amplitude of a sine wave?
Q-10. What term describes how much of a cycle has been completed?
Q-11. What determines the frequency of a sine wave?
Q-12. What is the period of a cycle?
