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(D) The wave is traveling in the negative $x$-direction. To determine the direction of motion of a particle at a given point,we can imagine the wave s

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both $(A)$ and $(B)$

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(D) The wave is traveling in the negative $x$-direction. To determine the direction of motion of a particle at a given point,we can imagine the wave shifting slightly to the left (negative $x$-direction). Points that are on the 'front' of the wave crest or trough relative to the direction of propagation will move in a specific direction. For a wave moving in the negative $x$-direction: - Points on the rising part of the wave (slope is negative) move upward. - Points on the falling part of the wave (slope is positive) move downward. Looking at the figure: - Point $a$ is on the rising slope of the crest,so it is moving upward. - Point $g$ is on the rising slope of the trough,so it is moving upward. - Point $f$ is at the bottom of the trough,so it is at its extreme position and momentarily at rest. Therefore,both points $a$ and $g$ are moving upward. The correct option is $(D)$.

The figure represents the instantaneous picture of a transverse harmonic wave traveling along the negative $x$-axis. Choose the correct alternative$(s)$ related to the movement of the nine points shown in the figure. The points moving upward is/are

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