Question

which measure does not change when a wave moves from one medium to another? (1 point)
○ speed
○ amplitude
○ frequency
○ wavelength

Explanation:

When a wave travels from one medium to another, the speed of the wave changes because different media have different properties (like density, elasticity) that affect wave propagation. Amplitude can change due to energy loss or gain at the boundary. Wavelength changes as speed changes (since \(v = f\lambda\), and if \(v\) changes and \(f\) is constant, \(\lambda\) must change). Frequency is determined by the source of the wave, so it does not change when the wave moves to a different medium.

Answer:

frequency