The Wave Equation Flashcards

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Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

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What is the wave equation?

v = f × λ. Wave speed equals frequency times wavelength.

In the wave equation, what do v, f, and λ stand for?

v is wave speed, f is frequency, and λ is wavelength.

What are the SI units for speed, frequency, and wavelength?

Speed in metres per second (m/s), frequency in hertz (Hz), wavelength in metres (m).

How do you find frequency from the wave equation?

f = v ÷ λ.

How do you find wavelength from the wave equation?

λ = v ÷ f.

What does 1 hertz (1 Hz) mean?

One wave per second.

If the wave speed stays the same, what happens to wavelength when frequency doubles?

The wavelength halves.

Calculate the speed: f = 10 Hz and λ = 0.5 m.

v = 10 × 0.5 = 5 m/s.

Calculate the frequency: v = 20 m/s and λ = 0.40 m.

f = 20 ÷ 0.40 = 50 Hz.

Calculate the wavelength: v = 15 m/s and f = 3.0 Hz.

λ = 15 ÷ 3.0 = 5.0 m.

A wave has λ = 4.0 cm and f = 5.0 Hz. What is its speed in m/s?

Convert 4.0 cm to 0.040 m; v = 5.0 × 0.040 = 0.20 m/s.

Does the wave equation work for both transverse and longitudinal waves?

Yes, it works for all waves.