No, amplitude is not always perpendicular to the rest axis. It depends on the type of wave. Longitudinal waves, such as sound waves, have amplitude parallel to the direction of propagation. Transverse waves, such as light waves, have amplitude perpendicular to the direction of propagation.
Amplitude does not have a direct effect on the wavelength of a wave. Wavelength is determined by the distance between two consecutive peaks or troughs of a wave. However, the amplitude can affect the intensity or energy of the wave, which can indirectly impact the wavelength.
Yes, amplitude can change along the wavelength of a wave. This is called amplitude modulation and is commonly used in communication systems. The amplitude of a wave can be increased or decreased at specific points along the wavelength to carry information.
The amplitude of a wave is measured as the maximum displacement of the wave from its equilibrium position. In other words, it is the height of the peak or depth of the trough of a wave. Amplitude is typically measured in units of distance, such as meters or centimeters.
Yes, amplitude can be negative in a wave. This occurs when the wave has a downward displacement from its equilibrium position. In mathematical terms, a negative amplitude indicates a phase shift of 180 degrees. This is commonly seen in waves that are reflected off a surface, such as water waves.