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Reflection of Light

Definition The bouncing off of light as it hits a surface.

Important Terms Incident Ray Reflected Ray Light ray that hits a surface Reflected Ray Light ray that bounces off the surface

incident ray normal reflected ray mirror

Important Terms Incident Ray Reflected Ray Normal Light ray that hits a surface Reflected Ray Light ray that bounces off the surface Normal Line that is perpendicular to the reflecting surface

incident ray Angle of incidence normal Angle of reflection reflected ray mirror

Important Terms Angle of incidence Angle of reflection Angle between the normal and the incident ray Angle of reflection Angle between the normal and the reflected ray

i r

Laws of reflection The angle of incidence equals the angle of reflection

i r

Laws of reflection The angle of incidence equals the angle of reflection. The incident ray, the reflected ray and normal all lie in the same plane.

Ray Diagrams for Plane Mirrors

Properties of the Image Object distance equals image distance Same size Virtual Erected

F

Left and right are interchanged ! Lateral inversion Left and right are interchanged !

Types of Reflection Regular Reflection Irregular Reflection

Uses of Reflection Reflectors for bikes and roads

Reflectors for photography

Rear-view mirrors

Telescopes Medical mirrors