Grade 10 Science – Optics Unit Cardinal Ambrozic C.S.S.

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Presentation transcript:

Grade 10 Science – Optics Unit Cardinal Ambrozic C.S.S.

Made by an artist Anish Kapoor 168 stainless steel sheets appears seamless Inspired by liquid Mercury Convex outer portion Concave inner portion

 A concave mirror is a mirror in which the reflecting surface is caved in  Another name for the concave mirror is a CONVERGING MIRROR. EXAMPLES:  Inside of a spoon  Used in headlights  Makeup Mirror

 CENTRE OF CURVATURE (C) - The centre point of a sphere that forms the curved mirror  PRINCIPAL AXIS (PA) – A horizontal line (90⁰) from the centre of curvature to the centre of the mirror  VERTEX (V) - The point where the principal axis meets the curved mirror.

 FOCAL POINT (F) - A point half-way between the centre of curvature and the vertex where all parallel light rays come together.  FOCAL LENGTH (f) - The distance or length between the focal point and the vertex.

C F V f Principal Axis

1. Place the bottom of the object on the principal axis. 2. Draw three incident rays from the top of your object and their respective reflected rays 3. Draw the image so that the bottom is on the principal axis and the top is where the 3 rays meet. 4. Determine the SALT characteristics of the image

 Refer to SMARTNote: Reflection Rules for Concave Mirrors

C F V PA Mirror S Larger A Inverted L In front of mirror T Real RAY DIAGRAM #1: Object between F and C

C F V PA Mirror S Smaller A Inverted L In front of mirror T Real RAY DIAGRAM #2: Object beyond C

C F V PA Mirror S Larger A Upright L Behind mirror T Virtual RAY DIAGRAM #3: Object between concave mirror and F