Why does Bluetooth connect wirelessly?
Show answer & explanation
Answer: Uses short-range radio waves
Creates magnetic fields — Wrong. Bluetooth doesn't create magnetic fields to transfer data. It transmits information through radio waves at 2.4GHz frequency, similar to WiFi but optimized for shorter range and lower power.
Uses short-range radio waves ✓ — Correct! Bluetooth uses short-range radio waves in the 2.4GHz frequency band. It works like a mini radio station - your devices broadcast and receive data through radio signals. The technology uses frequency hopping: it rapidly switches between 79 different frequencies to avoid interference. This is why Bluetooth works through walls and pockets but has limited range (usually 10-100 meters). It's designed for low-power, short-distance connections!
Sends ultrasonic sound waves — Wrong. Bluetooth doesn't use sound waves - it uses radio waves. Sound waves would require line-of-sight and wouldn't work through walls like Bluetooth does.
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