A) Radio waves
B) Sound waves
C) Infrared waves
D) UV waves
Answer: A
Explanation: An ordinary mobile phone communicates with the nearest tower by radio waves, a kind of electromagnetic wave.
A) Radio waves
B) Sound waves
C) Infrared waves
D) UV waves
Answer: A
Explanation: An ordinary mobile phone communicates with the nearest tower by radio waves, a kind of electromagnetic wave.
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