EM Spectrum Overview Flashcards
Which kind of waves can penetrate haze, light, rain, snow, clouds, and smoke?
Microwaves
How do the International Telecommunication Union (ITU) & Federal Communications Commission (FCC) identify the bands of the spectrum?
VLF
LF
MF
HF
VHF
UHF
SHF
EHF
How does NATO identify the bands of the spectrum?
A,B,C,D, etc.
How does the Institute of Electrical and Electronics Engineers (IEEE) identify the bands within the microwave section of the spectrum?
L
S
C
X
Ku
K
Ka
V
W
The IEEE bands are subdivisions of which bands?
UHF, SHF, EHF
UHF, SHF, & EHF collectively make up which kind of waves?
Microwaves
What range of freqs curves itself around the horizon of the curvature of the Earth?
300 kHz to 3 MHz
What range reflects off the ionosphere and then bounces back to the Earth. (They are called skywaves)
3 MHz to 30 MHz
How do freqs VHF and higher travel?
In a straight line (no bending or bouncing)
Who proved the existence of infrared waves in the 1800s?
Wm Herschel
Where on the spectrum does visible light fall?
Between infrared and UV
SATCOM uses what part of the spectrum?
Microwaves
