Multiple choice general knowledge science & technology

for remote control which propagation is used

  1. microwave

  2. radiowave

  3. infrared

  4. none of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Infrared (IR) propagation is used for remote controls because it's line-of-sight, low-power, and doesn't interfere with radio devices. IR signals are invisible to humans but reliably detected by receivers in TVs, AC units, and other appliances, making it ideal for short-range control.

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