When light rays from an object converge, they form an image of the object. The curvature of a lens is what causes light rays to bend. The angle at which light hits a surface is measured from the normal.
Opaque objects absorb or reflect the light.
Photons are light particles. Producers are the first level in the food chain. The term is often followed by a quantity that describes the radius of a circle whose circumference would match the shape being described. Images are not seen well through translucent objects, e.g., wax paper, sheer fabric. Images can be seen through transparent objects, e.g., clear glass.