The amplitude and direction of a wave are two distinct properties that describe different aspects of the wave.
Amplitude: The amplitude of a wave refers to the maximum displacement or distance that a particle in the medium of the wave moves from its equilibrium or rest position. In simpler terms, it represents the "height" or "intensity" of the wave. For example, in a transverse wave like a water wave or a light wave, the amplitude corresponds to the maximum height of the wave crest or the maximum distance the wave displaces from the equilibrium position. In a longitudinal wave like a sound wave, the amplitude represents the maximum compression or rarefaction of the medium.
Direction: The direction of a wave refers to the path or orientation along which the wave propagates or travels. Waves can travel in different directions depending on the nature of the wave and the medium through which it propagates. For example, water waves travel primarily in a horizontal direction across the surface of the water, while sound waves propagate in all directions outward from their source in a spherical pattern. Light waves can travel in straight lines unless they encounter any medium or object that causes them to change direction.
To summarize, the amplitude of a wave describes its magnitude or intensity, while the direction refers to the path or orientation along which the wave propagates.