Final answer:
Wave-particle duality does not exist for macroscopic scale objects; it is a phenomenon observed in quantum mechanics for particles like electrons and photons. Waves can superimpose regardless of their differing frequencies. Amplitudes of intersecting waves affect each other, not just when they are precisely aligned.
Step-by-step explanation:
Understanding Wave-Particle Duality and Wave Mechanics
Wave-particle duality is a fundamental concept in quantum mechanics, which tells us that every particle exhibits both wave and particle properties. This is true at the quantum level for particles like electrons and photons. However, for objects on the macroscopic scale, such as everyday objects we can see and touch, wave-particle duality does not apply. Thus, the statement that wave-particle duality exists for macroscopic objects is false.
Another key concept in wave mechanics is superposition, which allows waves of different frequencies to intermix, or superimpose. This process can happen regardless of whether the waves have the same frequency or different ones. Therefore, the statement that waves can superimpose if their frequencies are different is true.
Contrarily, when it comes to the relationship between the amplitude of waves, it is not only when they are precisely aligned that they affect each other. Due to the principle of superposition, when two waves meet, their amplitudes sum up at the point of their intersection. Hence, the statement that the amplitude of one wave is affected by the amplitude of another wave only when they are precisely aligned is false since waves can affect each other's amplitude whenever they interact, not just when they are aligned.