Describing Images formed by Plane & Curved Mirrors
Transcript of Describing Images formed by Plane & Curved Mirrors
Describing Images formed by Plane & Curved Mirrors
Characteristics of Images
u Locationu The image may be closer to or farther from the mirror than the object
u The image may be the same distance from the mirror as the object
u Orientationu The image may be upright or inverted (upside-down)
u Sizeu The image may be larger than or smaller than the object
u The image may be the same size as the object
u Typeu The image may be real or virtual
Real vs Virtual Images
u Real imageu Formed by actual rays of light; where reflected rays meet
u In front of the mirror
u Virtual imageu Formed by extended rays; not actual rays of light
u Behind the mirror
Last week…plane mirrors
u Locationu Same distance
u Orientationu Upright
u Sizeu Same size
u Typeu Virtual
Curved Mirrors
u Images not identical to object
Types of Curved Mirrors
u ConvexuReflecting surface
curves outwards
u ConcaveuReflecting surface
curves inwards
Types of Curved Mirrors
u ConvexuReflecting surface
curves outwards
u ConcaveuReflecting surface
curves inwards
Images in Convex Mirrors
u Incoming parallel light rays diverge (spread out)
u Extended rays show image forms behind the mirroruActual light rays do not
meetuVirtual image
Incident Rays
Reflected Rays
Images in Convex Mirrors
u Location is always behind the mirror
u Image is virtual
u Image is smaller and upright
Convex Mirrors in Real Life
u Reflect light from large incoming areau Security mirrorsuCar side mirrors
Images in Concave Mirrors
u Incoming parallel light rays converge (come together)
u Image formed depends on object location
Incident Rays
Reflected Rays
Images in Concave Mirrorsu Far from the mirror
u Inverted & smalleru In front of the mirroruReal image
u Close to the mirroruUpright & larger uBehind the mirroruVirtual image
Concave Mirrors in Real Life
u Light rays convergeu Light is concentrated
(brighter & focused)uCar headlights & flashlights
u Magnify close-up objectsuDentist mirror