What is frequency?

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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 frequency?

Explanation:
Frequency tells you how often a wave repeats each second. For a wave, it’s the number of wave crests (or cycles) that pass a fixed point in one second, and it’s measured in hertz (Hz). This directly matches the idea that frequency is how many waves pass a point per second. The other descriptions refer to different properties: the height of a wave is its amplitude, the distance between crests is its wavelength, and how fast the wave travels is its speed. Remember the relation that speed equals frequency times wavelength, linking these ideas together.

Frequency tells you how often a wave repeats each second. For a wave, it’s the number of wave crests (or cycles) that pass a fixed point in one second, and it’s measured in hertz (Hz). This directly matches the idea that frequency is how many waves pass a point per second. The other descriptions refer to different properties: the height of a wave is its amplitude, the distance between crests is its wavelength, and how fast the wave travels is its speed. Remember the relation that speed equals frequency times wavelength, linking these ideas together.

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