A standard mobile telephone communicates via___________?
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Answer: D. Radio waves
Explanation
Cellular mobile phones communicate wirelessly by transmitting and receiving radio frequency electromagnetic waves. Base station towers relay these radio signals across vast networks to connect calls and data. Radio frequencies provide the necessary bandwidth and distance capabilities for modern telecommunication devices. Radio waves occupy the lowest energy portion of the electromagnetic radiation spectrum with long wavelengths. Mobile devices contain internal radio transmitters and receivers tuned to specific frequency channels. Digital data is encoded onto radio carrier waves using sophisticated modulation techniques for transmission.
Cellular networks enable global wireless communication for billions of smartphones used in daily life. Government regulatory agencies allocate specific radio frequency bands to prevent interference between services. Wireless technology has transformed modern society by providing instant connectivity across remote locations. Sound waves are mechanical vibrations that cannot travel through empty space between distant cell towers. Infrared waves are typically used for short-range remote controls rather than long-distance cellular calls. Ultraviolet waves possess high energy and are not utilized for standard wireless telecommunication systems.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
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