Learning Outcome Draw a ray diagram to find the position, nature and size of the image produced by a concave and convex mirrors

Plane Mirrors Eye sees image back here Image is virtual and laterally inverted Light from object reflects into eye

Curved (Concave) Mirrors F P c pa f P = pole , pa = principal axis C = centre of curvature, c = radius of curvature F = Focal point or focus, f = focal length f = c / 2

Ray Diagrams Rule 1: An incident ray parallel to the pa is reflected back through the focal point. F

Ray Diagrams Rule 2: An incident ray that passes through the focal point on the way to the mirror is reflected back parallel to the pa. F

Ray Diagrams Rule 3: An incident ray headed towards the pole reflects back at an equal angle P F

All three combined allow you to find the image In this example the image is inverted, diminished and real object F P image

Concave Mirrors Concave (or converging) mirrors focus light at the focal point. F

Convex Mirrors Convex mirrors have a focal point behind the mirror. Convex (or diverging) mirrors spread the light rays apart so that they appear to have come from the focal point F

Ray Diagrams The same rules can be applied to convex mirrors… All convex mirror images are virtual. object F image