BasicStudents matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient)Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
AdvancedStudents matched to this level are ready for material that requires superior performance and mastery.
Refraction of light in matter and how light changes its speed and angle of refraction according to the type of medium it is travelling through. What a lens is and what it does, concave and convex lenses.
This indicates how strong in your memory this concept is