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?
1) The wavelength doubles but the wave speed remain unchanged.
2) The wavelength is halved but the wave speed is unchanged.
3) The wavelength is unchanged but the wave speed doubles.

b) If the amplitude of the oscillator doubles, what happens to the wavelength and wave speed?
1) Both wavelength and wave speed are unchanged.
2) The wavelength is unchanged but the wave speed doubles.
3) The wavelength doubles but the wave speed remain unchanged.