What is the frequency of 20m?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
If 20m refers to wavelength, you can calculate frequency using f = v/λ:
For electromagnetic waves (radio waves in air/vacuum):
- f = (3 × 10⁸ m/s) ÷ 20m = 15,000,000 Hz = 15 MHz
- This is in the shortwave radio band
For sound waves (in air at 20°C):
- f = 343 m/s ÷ 20m = 15 Hz
- This is a very low frequency, below typical human hearing
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