Question

A periodic wave travels from one medium to another. Which pair of variables are likely to change in process?
A. velocity and wavelength
B. velocity and frequency
C. frequency and wavelength
D. frequency and phase
E. wavelength and phase

Answer 1

A... Velocity for traverse waves is given by sqrt(Tension/mass density). As the mass density of two mediums are different, the velocity changes. Frequency always remains constant. But, as velocity changes, and frequency is constant, so the wavelength has to change as vel=wavelength*frequency

Answer 2

Thanks! :)