Respuesta :

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Wavelength is defined as distance between two troughs or two crests !!

so in this wavelength is 4 metres !!

Answer:

C 4 meters

Explanation:

Wavelength is the distance between two successive crests or between two successive troughs.

Here the distance between the top peak and the bottom peak is 2 m as seen from the figure given which is half a wavelength .

So the wavelength is twice this and is 4 meters.