NCEA Level 3 Waves 2025 – 400 Free Practice Questions to Pass the Exam

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What occurs during destructive interference?

Waves combine to create a wave with larger amplitude

Waves combine to create a wave with smaller amplitude

During destructive interference, waves combine in such a way that their amplitudes partially or fully cancel each other out, leading to a resultant wave with a smaller amplitude than that of the individual waves. This phenomenon occurs when two or more waves overlap, specifically when a peak of one wave coincides with a trough of another wave, which effectively reduces the overall amplitude of the combined signal. In the case of complete destructive interference, the waves may cancel each other out entirely, resulting in a net amplitude of zero at that point.

This principle is crucial in understanding wave behavior in various contexts, such as sound waves, light waves, and water waves. It illustrates the fundamental nature of wave interactions and is utilized in applications like noise-canceling headphones and various types of acoustics.

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Waves travel faster through the medium

Waves cancel out and do not transfer energy

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