The cones sense color. White light is perceived when all visible light strikes the cones with nearly equal intensity. Leaves are green because leaves, or chlorophyll inside the leaves, reflects green light. Most of what we see is due to reflection of incident light. In reflection, the angle of incidence is equal to the angle of reflection.
Sunlight reflects the surface at the same angle it strikes the surface.
Transmission of Light Light that passes through a substance is said to be transmitted. Upon entering a denser substance, transmitted light slows in speed. If the light enters at an angle, the light's path bends. This bending is termed refraction . Light that travels from a less-dense to a more dense medium looses speed and bends toward the normal.