What happens when two waves of the same frequency and amplitude meet in phase?
Correct answer: B. They combine to form a wave double the amplitude, resulting in constructive interference
- A. They cancel each other out resulting in a destructive interference
- B. They combine to form a wave double the amplitude, resulting in constructive interference
- C. They produce a wave with zero amplitude
- D. They produce a wave with the same amplitude as the individual waves
Explanation
This option is correct. When two waves of the same frequency and amplitude meet in phase (their peaks and troughs align), they combine constructively, resulting in a wave with an amplitude that is the sum of their individual amplitudes, effectively doubling it.
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About Waves
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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