1. Waves
Reflection: Recall the law of reflection and be able to draw a suitably label diagram to represent the law.
Draw appropriate diagrams for the reflection of parallel rays from convex, concave and plane mirrors.

2. Refraction: find out the conditions under which refraction occurs
Waves
Refraction: find out the conditions under which refraction occurs
Can you explain in your own words why waves refract towards the normal when passing from low density medium to a high density medium
Draw appropriate diagrams to link refraction, reflection and critical angle

3. Diffraction Why do waves diffract around objects and through gaps
What is Huygen’s Principle?