Which type of transmission uses the shortest waves?

GSM telephony
CB radio
VHF radio
satellite TV
The Ku band is the portion of the electromagnetic spectrum in the microwave range of frequencies from 12 to 18 gigahertz (GHz). Ku band is primarily used for satellite communications, most notably for fixed and broadcast services, and for specific applications such as NASA's Tracking Data Relay Satellite used for both space shuttle and International Space Station
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Answers by country

GSM telephony
CB radio
VHF radio
satellite TV
answers
flagGreece
6%
6%
31%
56%
16
flagIndia
12%
17%
14%
54%
109
flagthe United States
4%
30%
16%
48%
43
flagAustralia
6%
33%
13%
46%
15
flagGermany
7%
26%
33%
33%
42
flagPoland
16%
33%
27%
22%
4331
flagthe United Kingdom
24%
32%
24%
20%
25
flagUnknown
20%
20%
40%
20%
10