Question 22: A wave in a soft string reflects from a hard steel rod. Nitro phale difference relative to the incident wave will be (Tag : Waves motion and sound sub-tag : Wave Motion )
Correct answer: C. 180°
- A. 0°
- B. 90°
- C. 180°
- D. 76°
Explanation
Explanation: When a wave traveling in a soft string reflects from a hard steel rod (fixed end), there is a phase change of 180 degrees upon reflection. This is due to the fact that a wave reflects with an inverted phase when it encounters a fixed boundary.
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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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