Three consecutive flash photographs of a travelling wave on a string wave on a string are reproduced in the figure here. The following oberservation are made. Mark the one which is correct. (Mass per unit length of the sting `= 3 g//cm`.)

Options

A. displacement amplitude of the wave is `0.25 m`, wavelength is `1 m`, wave speed is `2.5 m//s` and the frequency of the driving force is `0.2 //s`.
B. displacement amplitude of the wave is `2.0 m`, wavelength is `2 m`, wave speed is `0.4 m//s` and the frequency of the driving force is `0.7 //s`.
C. displacement amplitude of the wave is `0.25 m`, wavelength is `2 m`, wave speed is `5 m//s` and the frequency of the driving force is `2.5 //s`.
D. displacement amplitude of the wave is `0.5 m`, wavelength is `2 m`, wave speed is `2.5 m//s` and the frequency of the driving force is `0.2//s`.

Answer

C

Explanation

Clear from the figure