Reflection in Curved Mirrors OPTICS Reflection in Curved Mirrors

Types of Mirrors Convex (Diverging Mirror) Concave (Converging Mirror) Makes parallel rays diverge away from each other Concave (Converging Mirror) Makes parallel rays converge towards each other

Types of Mirrors Applications of Concave Mirrors Satellite Dish

Types of Mirrors Applications of Convex Mirrors Security Mirrors

Points of Interest (Concave Mirror) FRONT OF MIRROR BACK OF MIRROR Object Focus Vertex Principal Axis Centre of Curvature

Points of Interest (Convex Mirror) BACK OF MIRROR FRONT OF MIRROR Object Centre of Curvature Vertex Principal Axis Focus

Finding an Image (Concave Mirror) FRONT OF MIRROR BACK OF MIRROR Object Focus Vertex Principal Axis Centre of Curvature

Finding an Image (Concave Mirror) LINE 1 Draw a straight line from the top of the object straight to the mirror (parallel to the principal axis Then, from that point in the mirror, reflect the light ray off the mirror, through the focus.

Finding an Image (Concave Mirror) FRONT OF MIRROR BACK OF MIRROR Object Principal Axis Focus Vertex Centre of Curvature LINE 1

Finding an Image (Concave Mirror) LINE 2 Draw a second line from the top of the object, through the focus to the mirror. Then, reflect the light ray straight back, parallel to the principal axis

Finding an Image (Concave Mirror) FRONT OF MIRROR BACK OF MIRROR Object Principal Axis Focus Vertex Centre of Curvature LINE 2 LINE 1

Finding an Image (Concave Mirror) LINE 3 Draw a line from the top of the object, through the centre of curvature to the mirror. Then, reflect the light ray straight back, along the same line

Finding an Image (Concave Mirror) LINE 3 FRONT OF MIRROR BACK OF MIRROR Object Principal Axis Focus Vertex Centre of Curvature LINE 2 LINE 1

Finding an Image (Concave Mirror) Finally, the top of the image is located at the intersection point of your light rays after they reflect off the mirror. Note: You only need to draw two of the three lines to locate an image.

Finding an Image (Concave Mirror) FRONT OF MIRROR BACK OF MIRROR LINE 3 Object Principal Axis Focus Vertex Centre of Curvature LINE 2 IMAGE LINE 1

Describing an Image To describe an image use SALT S - Size (Bigger or Smaller than Object) A - Attitude (Upright or Inverted) L - Location (In Front or Behind Mirror) T - Type (Real or Virtual)

Describing an Image FRONT OF MIRROR BACK OF MIRROR Object Principal Axis Focus Vertex Centre of Curvature IMAGE LINE 2 S – Smaller A – Inverted L – In Front of Mirror T – Real Image LINE 1

Finding an Image (Convex Mirror) BACK OF MIRROR FRONT OF MIRROR Object Centre of Curvature Vertex Principal Axis Focus

Finding an Image (Convex Mirror) LINE 1 Draw a straight line from the top of the object straight to the mirror (parallel to the principal axis Then, from that point in the mirror, reflect the light ray off the mirror, in line with the focus. Then, extend the reflected ray into the virtual space behind the mirror

Finding an Image (Convex Mirror) BACK OF MIRROR FRONT OF MIRROR Object Centre of Curvature Vertex Principal Axis Focus LINE 1

Finding an Image (Convex Mirror) LINE 2 Draw a straight line from the top of the object towards the focus. Then, from that point in the mirror, reflect the light ray off the mirror, parallel to the principal axis. Then, extend the reflected ray into the virtual space behind the mirror

Finding an Image (Convex Mirror) BACK OF MIRROR FRONT OF MIRROR Object LINE 2 Centre of Curvature Vertex Principal Axis Focus LINE 1

Finding an Image (Convex Mirror) LINE 3 Draw a straight line from the top of the object towards the centre of curvature. Then, from that point in the mirror, reflect the light ray off the mirror, right back along that line. Then, extend the reflected ray into the virtual space behind the mirror

Finding an Image (Convex Mirror) BACK OF MIRROR FRONT OF MIRROR Object LINE 2 Centre of Curvature Vertex Principal Axis Focus LINE 3 LINE 1

Finding an Image (Convex Mirror) Finally, the top of the image is located at the intersection point of your light rays after they reflect off the mirror. Note: You only need to draw two of the three lines to locate an image.

Finding an Image (Convex Mirror) BACK OF MIRROR FRONT OF MIRROR Object LINE 2 Centre of Curvature Vertex Principal Axis IMAGE Focus LINE 3 LINE 1

Describing an Image To describe an image use SALT S - Size (Bigger or Smaller than Object) A - Attitude (Upright or Inverted) L - Location (In Front or Behind Mirror) T - Type (Real or Virtual)

Finding an Image (Convex Mirror) BACK OF MIRROR FRONT OF MIRROR Object LINE 2 Centre of Curvature Vertex Principal Axis IMAGE Focus LINE 3 LINE 1 S – Smaller A – Upright L – Behind Mirror T – Virtual Image