What is amplitude?

Explore Alberta's Grade 8 Science curriculum on Light and Optical Systems. Test your knowledge with engaging quizzes including flashcards and multiple choice questions. Prepare effectively for your exam!

Multiple Choice

What is amplitude?

Explanation:
Amplitude is the maximum distance the particles of a medium move away from their resting position as a wave passes. In a transverse wave, the medium oscillates around the equilibrium line, and the height from this middle line up to a crest (or down to a trough) is the amplitude. The distance between crests is the wavelength, not amplitude, and the speed is how fast the wave moves, determined by the medium and other factors. Energy is related to amplitude (larger amplitude generally means more energy) but is not the same thing as amplitude. So the measure from the middle level to a crest or to a trough is amplitude.

Amplitude is the maximum distance the particles of a medium move away from their resting position as a wave passes. In a transverse wave, the medium oscillates around the equilibrium line, and the height from this middle line up to a crest (or down to a trough) is the amplitude. The distance between crests is the wavelength, not amplitude, and the speed is how fast the wave moves, determined by the medium and other factors. Energy is related to amplitude (larger amplitude generally means more energy) but is not the same thing as amplitude. So the measure from the middle level to a crest or to a trough is amplitude.

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