Frequency and wavelength

Frequency and wavelength

Secondary 2
6 marks
TGM Original Questions

In a hypothetical wave model, 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]
  2. Find the wavelength at \(800\) kHz.[2]
  3. Find the frequency at \(2400\) m.[2]

Solution:

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

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