To find the amplitude of a sine wave, you need additional information beyond just the wavelength, frequency, or period. The wavelength (λ) represents the distance between two consecutive points of similar phase on the waveform, while the frequency (f) is the number of complete cycles (oscillations) of the waveform that occur in one second. The period (T) is the time it takes for one complete cycle of the waveform.
The amplitude (A) of a sine wave represents the maximum displacement of the wave from its equilibrium position. It is usually denoted as the distance from the equilibrium to the peak or trough of the wave. However, the amplitude cannot be determined solely from the wavelength, frequency, or period. You would need additional information or measurements, such as the maximum displacement from the equilibrium position or the values of the wave at specific points.
If you have the equation of the sine wave in the form A*sin(ωt + φ), where A is the amplitude, ω is the angular frequency (2πf), t is time, and φ is the phase constant, then the amplitude A is directly given in the equation.
In summary, the amplitude of a sine wave cannot be determined solely from the wavelength, frequency, or period. You need additional information or measurements of the wave to find its specific amplitude.