Which of the following changes must when a wave changes its medium?
Correct answer: C. Speed
- A. Frequency
- B. Amplitude
- C. Speed
- D. None of these
Explanation
When a wave travels from one medium to another, its speed changes. This is because the speed of a wave is dependent on the properties of the medium through which it is traveling. For example, the speed of sound is faster in solids than in liquids, and faster in liquids than in gases. The frequency of a wave, however, remains constant when it changes mediums.The relationship between the speed of a wave, its frequency, and its wavelength is given by:Copyv = fλwhere:v is the speed of the wavef is the frequency of the waveλ is the wavelength of the waveWhen a wave changes mediums, its wavelength changes to maintain a constant frequency. This change in wavelength leads to a change in the speed of the wave.
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About Simple Harmonic Motion
Simple harmonic motion is oscillation in which acceleration is directly proportional to displacement and directed toward the equilibrium position. Work includes displacement, velocity, acceleration, phase, period, frequency, amplitude and energy, with applications to springs and simple pendulums. The restoring force and the conditions for SHM distinguish it from general periodic motion.
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