Teach basic concepts associated with light energy. Concepts include transparent, opaque, and translucent materials, reflection, refraction, sources of light, breaking up light, concave and convex lenses and eye safety. This resource is part of our Light and Shadow Unit.This resource includes:lessons about eye safety, sources of light (natural and artificial light), transparency, opacity, translucency, shadows, breaking up light (light spectrum), reflection, angle of reflection, concave and conv