Which among the following waves is used for communication by artificial satellites ?
Correct answer: A. Micro waves
- A. Micro waves
- B. Radio waves
- C. A. M.
- D. Infra-red waves
Explanation
Artificial satellites commonly use microwaves because they have short wavelengths, carry large amounts of information, and pass through the atmosphere with relatively little absorption. They are a high-frequency portion of the radio-wave spectrum.
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