Radio waves and microwaves are used in which of the following communications?
Wireless
Fiber optics
IP Telephony
Image sensor
The most common wireless technologies use radio waves. With radio waves distances can be short, such as a few meters for Bluetooth or as far as millions of kilometers for deep-space radio communications. Somewhat less common methods of achieving wireless communications include the use of other electromagnetic wireless technologies, such as light, magnetic, or electric fields or the use of sound.
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Answers by country
Wireless
Fiber optics
IP Telephony
Image sensor
answers
Republic of Ireland
18
Australia
14
India
22
Poland
1808
the United States
30
Austria
22
Greece
13
Germany
72
the United Kingdom
30