Sec 19.1

 Review of Law: the angle of reflection is equal to the angle of incidence  We use ray diagrams to show how light rays change direction when they strike mirrors and pass through lenses.

 Plane mirror –mirror with a flat surface  Plane mirrors create an image through these steps: 1. Light rays strike you and reflect 2. Reflected rays then strike the mirror

 Plane mirror –mirror with a flat surface  Plane mirrors create an image through these steps: 3. The rays are reflected again to your eye 4. Your brain interprets the rays to come from behind the mirror.

 Plane mirrors produce a virtual image (a copy of an object formed a point from which light appears to be coming)

 A concave mirror has the reflecting surface curved inwards.  The curve causes the reflected rays to come together in a point called the focal point.

 Concave mirrors can form either real or virtual images, depending on where the object is located.  Use in automobile headlights and flashlights

 A convex mirror has the reflective surface curved outwards.  Convex mirrors always cause light rays to spread out and form only virtual images.  Used for car side mirrors and store aisle mirrors.

 Concave mirrors can form either real or virtual images, depending on where the object is located.  Use in automobile headlights and flashlights