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Question

The figure below shows the distance-displacement graph of two waves A and B. Compare the wavelength of the two waves.

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Solution

Wavelength of wave is the distance between two consecutive crests or troughs in waveform.
Wavelength of A = 8 cm
Wavelength of B = 16 cm
The ratio of their wavelength is
$\frac{λ_{A}}{λ_{B}} = \frac{8}{16} = 1 : 2$

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