p11.3 reflection and refraction

p11.3 reflection and refraction

1. plane waves in a ripple tank are reflected from a straight barrier at the same angle to the barrier as the incident waves because their speed and wavelength do not change on reflection

2. plane waves crossing a boundary between two different materials are refracted unless they cross the boundary at normal incidence

3. refraction occurs at a boundary between two different materials

4. At a boundary between two different materials, waves can be transmitted and absorbed.