When a wave goes from one medium to another, there is a no change in the:
Correct answer: A. Frequency
- A. Frequency
- B. Amplitude
- C. Wavelength
- D. Velocity
Explanation
Option A is correct. Frequency is the number of waves that pass a point in one second. When a wave goes from one medium to another, the frequency remains the same. This is a fundamental property of waves known as the principle of frequency invariance.
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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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