Reflections in Mirrors

Vocabulary Mirror – A surface that reflects light rays. There are 3 types of mirrors. Plane Flat, Convex, Concave Converge- Light rays that come together at a focal point Diverge- Light rays scatter outward in all directions

Vocabulary Object – A source of diverging light rays(arrow) Image – is the reproduction of the object formed in a mirror or lens. There are two types of images REAL-an image that appears in front of the mirror when drawing the ray diagram VIRTUAL –where light rays appear to come together behind the mirror

Vocab Principal Axis-(P) is the straight line that is perpendicular to the surface of the mirror Focal Point-Where all light rays converge. It is half the distance of the center of curvature Center (Radius) of Curvature – Is the double the distance of the focal length

Vocab ho = height of object hi = height of image f = focal length Di = distance to image from the mirror Do = distance to object from the mirror Inverted image= upside down Upright image=Right side up

Images for Mirrors Plane Mirror = all images are upright, virtual, same size***Remember the Law of Reflection***** Convex Mirror = all images are upright, smaller, virtual Concave Mirror = image depends on location of object****if object is on the focal point, no image is formed!!!

Mirror Equations If di is negative, then image is virtual If di is positive, then image is real focal length (f) is negative for a convex mirror. All other mirrors are positive.

Rules for predicting images #1 Draw light ray parallel to axis Reflection will be through the focal point # 2 Draw light ray through focal point Reflection will be parallel to the axis #3 Where the reflective light rays intersect is the image #4 Identify the type of image