Refraction

Sorry I'm late . Today I'll tell about what we studied on last Thursday (Refraction).
When a wave travels at an angle into a medium in which its speed is less, the refracted wave ray is bent (refracted) towards the normal. For example, when a wave ray travels from deep water to shallow water, the angle of refraction is smaller than the angle of incidence. And when a wave ray travel from shallow water to deep water, the angle of refraction is bigger than the angle of incidence. Don't forget to do the Worksheet 23 and exercises about refraction.