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.
- Express \(f\) in terms of \(\lambda\).[2]
- Find the wavelength at \(800\) kHz.[2]
- 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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