For a wavelength of 22 meters in the high-frequency range, which frequency is correct?

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Prepare for the REMBE Electrotherapy Test. Study with flashcards and multiple choice questions. Each question comes with hints and explanations. Master electrotherapy concepts and get ready for your exam!

Multiple Choice

For a wavelength of 22 meters in the high-frequency range, which frequency is correct?

Explanation:
The key idea is that wavelength and frequency for electromagnetic waves are inversely related: f = c/λ, with c about 3.00 × 10^8 m/s. For a wavelength of 22 meters, the frequency is f ≈ 3.00 × 10^8 / 22 ≈ 13.6 MHz. That matches 13.56 MHz, a standard high‑frequency (ISM) band used in many medical and RF applications. The other frequencies correspond to shorter wavelengths (27.12 MHz gives about 11.1 m, and 40 MHz about 7.5 m), not 22 m. So the correct frequency is 13.56 MHz.

The key idea is that wavelength and frequency for electromagnetic waves are inversely related: f = c/λ, with c about 3.00 × 10^8 m/s. For a wavelength of 22 meters, the frequency is f ≈ 3.00 × 10^8 / 22 ≈ 13.6 MHz. That matches 13.56 MHz, a standard high‑frequency (ISM) band used in many medical and RF applications. The other frequencies correspond to shorter wavelengths (27.12 MHz gives about 11.1 m, and 40 MHz about 7.5 m), not 22 m. So the correct frequency is 13.56 MHz.

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