An oscillator creates periodic waves on a stretched string. a) If the period of

Question

An oscillator creates periodic waves on a stretched string.

a) If the period of the oscillator doubles,what happens to the wavelength and wave speed?
The wavelength doubles but the wave speed isunchanged. The wavelength is halved but the wave speed isunchanged. The wavelength is unchanged but the wave speeddoubles.

b) If the amplitude of the oscillatordoubles, what happens to the wavelength and wave speed?
Both wavelength and wave speed areunchanged. The wavelength is unchanged but the wave speeddoubles. The wavelength doubles but the wave speed isunchanged.
a) If the period of the oscillator doubles,what happens to the wavelength and wave speed? b) If the amplitude of the oscillatordoubles, what happens to the wavelength and wave speed?
The wavelength doubles but the wave speed isunchanged. The wavelength is halved but the wave speed isunchanged. The wavelength is unchanged but the wave speeddoubles.

Explanation / Answer

Part A

If the period of the oscillator doubles, what happens to the wavelength and wave speed?

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Part B

If the amplitude of the oscillator doubles, what happens to the wavelength and wave speed?

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As you have discovered, when waves travel along a string, the wave speed remains unchanged, unless the properties of the string are changed. The wavelength can be varied only by changing the frequency, or alternatively the period, of the oscillator that creates the waves.

The wavelength doubles but the wave speed is unchanged.

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