Reflection

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Erta Tema Optics Optics is a branch of physics that studies the behaviour and properties of light, as well as mirrors, lenses, and how we humans/ our eyes perceive light.

av Erta Tema

Specular

Diffuse

Rough surfaces

The normals are all facing different directions < r are all different from each other

Smooth and flat surfaces

All normals are perpendicular to the surface < i = < r

Reflection

Description of image

Type

Location

Attitude

Size

Laws

The reflected ray, the normal and the incedent ray all lie on the same plane

The refelcted ray and incedent ray are on opposite sides of the normal

The angle of reflection (r) = the angle of incidence (i)

Concave Mirrors

creates a real image

Magnifying glasses

Teloscopes

cosmetic or magnifying mirrors

Plane Mirrors

To check appearances

Object distance (di) in front of the mirror = Image disntance (di) behind the mirror

Any smooth, flat, reflecting surface

Triple Corner Mirrors

Retroflection

Light rays bouncing off and shining back to the source

Applications

Reflective clothing

Reflective signs

Convex Mirrors

Diagram

Takes up a smaller angle and looks smaller

Aplications

Car mirrors

Security Mirrors

Car headlights