A student wrote the following statements about mechanical waves
PHYSICS · Multi-part · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics
Problem
A student wrote the following statements about mechanical waves. Write ‘True’ or ‘False’ against each statement and, for every statement marked ‘False’, supply one brief corrective sentence that removes the error.
(i) Increasing the amplitude of a wave increases its speed in the medium.
(ii) The wavelength of a wave decreases when the wave enters a medium in which it travels faster.
(iii) The period of a wave is the reciprocal of its frequency.
(iv) When sound from a tuning fork travels from air into water, its frequency changes.
(v) A point that is one wavelength away from a given crest is always in the opposite phase to that crest.