Is amplitude always perpendicular to the rest axis?in a wavelength

[isyang94]

Is amplitude always perpendicular to the rest axis?
in a wavelength amplitude it the distance between either the crest or through from the equbilium line. then in the case of transverse vibration, what is its amplitude?
thanks

 

[Studiot]

Yes that is correct.

In a transverse vibration the amplitude is the greatest excursion (distance) from equilibrium reached by the vibrating particle.

In other words it is half the vertical distance between the trough and the peak (crest).