Frequency and wavelength

Frequency and wavelength

Secondary 2
TGM Original Questions

Radio-wave frequency \(f\) kHz is inversely proportional to wavelength \(\lambda\) m. A frequency of \(60\) kHz has wavelength \(1200\) m.

  1. Express \(f\) in terms of \(\lambda\).
  2. Find the wavelength at \(800\) kHz.
  3. Find the frequency at \(2400\) m.

Solution:

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Answer:(i) \(f=\frac{72000}{\lambda}\); (ii) \(90\) m; (iii) \(30\) kHz.

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