High Plains 3rd grade studied light and sound with convex and concave mirrors. Here they hold spoons for convex and concave. Photo provided. High Plains 3rd grade studied light and sound with convex and concave mirrors. Here they hold spoons for convex and concave. Photo provided.
High Plains 3rd grade studied light and sound with convex and concave mirrors. Here they hold spoons for convex and concave. Photo provided.
