High frequency (short wave diathermy) wavelength of 11 meters corresponds to which frequency?

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Multiple Choice

High frequency (short wave diathermy) wavelength of 11 meters corresponds to which frequency?

Explanation:
Wavelength and frequency of electromagnetic waves are linked by f = c / λ. With a wavelength of 11 meters, the frequency is f ≈ (3.0 × 10^8 m/s) / 11 m ≈ 2.7 × 10^7 Hz, or about 27 MHz. This matches the standard shortwave diathermy frequency of 27.12 MHz, which is why 11 meters corresponds to that frequency. For reference, a frequency of 40 MHz would give a wavelength of about 7.5 meters, and 13.56 MHz would give a wavelength around 22 meters, so those do not align with 11 meters.

Wavelength and frequency of electromagnetic waves are linked by f = c / λ. With a wavelength of 11 meters, the frequency is f ≈ (3.0 × 10^8 m/s) / 11 m ≈ 2.7 × 10^7 Hz, or about 27 MHz. This matches the standard shortwave diathermy frequency of 27.12 MHz, which is why 11 meters corresponds to that frequency. For reference, a frequency of 40 MHz would give a wavelength of about 7.5 meters, and 13.56 MHz would give a wavelength around 22 meters, so those do not align with 11 meters.

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