PHYS 251 Chapter Notes - Chapter 18.2: Specular Reflection, Optical Axis, Curved Mirror
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Specular reflection: reflection from a smooth, shiny, surface like a mirror. Incident and reflected rays are both in a plane that is normal (or perpendicular) to the reflective surface. Angle of incidence: the angle between the incidence ray and a line perpendicular to the surface () Angle of reflection: the angle between the reflected ray and the normal to the surface () Law of reflection states that (1) the incidence ray and the reflected ray are both in the same plane which is perpendicular to the surface (2) the angle of reflection equals the angle of incidence. Diffuse reflection: reflection of light rays off of a surface like paper that isn"t shiny like a mirror (rough surface) irregularities of the surface causes the reflected rays to leave in many random directions. *law of reflection still obeyed at each point. Plane mirror: flat surface, horizontal rays strike the mirror at 0 angle of incidence so it reflects back with.