Amplitude is crest to rest or trough to rest.

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Study for the Georgia High School Physical Science Test. Prepare with flashcards and multiple-choice questions, detailed hints and explanations included. Get ready for your exam!

Multiple Choice

Amplitude is crest to rest or trough to rest.

Explanation:
The thing being tested is what amplitude represents in a wave. Amplitude is the maximum distance the medium moves from its rest (equilibrium) position. That means you measure from the rest line up to a crest or down to a trough. So crest to rest or rest to crest are both the same distance, and that distance is the amplitude. Crest to trough, or crest to crest, spans both extremes and is twice the amplitude. Rest to rest would be zero. That’s why crest to rest (or rest to crest) best describes the amplitude.

The thing being tested is what amplitude represents in a wave. Amplitude is the maximum distance the medium moves from its rest (equilibrium) position. That means you measure from the rest line up to a crest or down to a trough. So crest to rest or rest to crest are both the same distance, and that distance is the amplitude. Crest to trough, or crest to crest, spans both extremes and is twice the amplitude. Rest to rest would be zero. That’s why crest to rest (or rest to crest) best describes the amplitude.

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