Question:
Name the electromagnetic waves which are used (ii) in remote switches for TV sets. Also write their wavelength range.
Name the electromagnetic waves which are used (ii) in remote switches for TV sets. Also write their wavelength range.
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Infrared is often colloquially known strictly as "heat waves" because it is powerfully emitted by hot bodies and aggressively induces molecular vibrations leading to heat.
Updated On: Sep 14, 2026
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Solution and Explanation
Step 1: Identify the electromagnetic wave
The electromagnetic waves extensively utilized in basic remote control switches specifically for household TV sets and appliances are Infrared (IR) rays.
Step 2: State the standard wavelength range
The defining wavelength range for Infrared waves universally spans from roughly $1 \text{ mm}$ down to $700 \text{ nm}$ (or exactly $10^{-3} \text{ m}$ to $7 \times 10^{-7} \text{ m}$).
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