The phase change of 180 is equivalent to a path difference:
Correct answer: A. λ/2
- A. λ/2
- B. λ
- C. 2λ
- D. 4λ
Explanation
A full cycle 2π corresponds to λ, so phase π (180°) corresponds to λ/2 path difference. Thus, option A is correct.
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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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