In the diagram below, the interval PQ represents:
Correct answer: D. Period/2
- A. Wavelength/2
- B. 2 x amplitude
- C. Wavelength
- D. Period/2
Explanation
The interval PQ is the time taken for the oscillation to move from one point to another completing half a cycle, which corresponds to half of the period in simple harmonic motion. The period is the time taken for one complete cycle of oscillation. Therefore, the correct answer is Period/2.Option A is incorrect as it confuses the time interval with a spatial interval (wavelength). Option B is incorrect because it deals with amplitude, which is a measure of maximum displacement, not time. Option C is incorrect because wavelength is a spatial measure, not a temporal one.
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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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