Answer:
The answer is period T=0.0015 s.
Step-by-step explanation:
The general formula for a sine wave is

where:
- A: is the amplitude of the wave
- w is the angular speed of the wave and is defined by :

and f is the frequency of the wave.
- Theta is the phase of the wave
The period is defined as

As you can see, the wavelength is not used to determine the period of the wave, it is used to determine the speed of the wave and is given by the equation:

Where, v is the speed, x the length and f the frequency of the wave respectively.