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questionedithistorytranslations
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flag English language

What kind of electromagnetic waves does the typical tv remote use?
radio waves
infrared radiation
ultraviolet
ultrasound
Early television remote controls used ultrasonic tones. Present-day remote controls are commonly consumer infrared devices which send digitally-coded pulses of infrared radiation to control functions such as power, volume, channels, etc.
Ninjai
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wikipedia → Remote control
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flag Polish language

Za pomocą jakich fal wysyła sygnały typowy pilot TV?
fal radiowych
podczerwieni
ultrafioletu
ultradźwięków
Fale podczerwieni, o długości niewiele większej od koloru czerwonego, zachowują się podobnie do światła widzialnego. Można odbijać sygnał pilota od lustra, sufitu lub białej ściany.
Przemek
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