Concave Mirrors Curves inward Concave Mirrors AKA converging

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Concave Mirrors • Curves inward

Concave Mirrors • Curves inward

Concave Mirrors • AKA converging mirror • Described as a mirror with a surface

Concave Mirrors • AKA converging mirror • Described as a mirror with a surface that curved inward like a bowl

Terminology Principle Axis (PA) Vertex Centre of Curvature (C) Focus (F)

Terminology Principle Axis (PA) Vertex Centre of Curvature (C) Focus (F)

Light Rays in a Concave Mirror Purpose: To determine how light behaves in a

Light Rays in a Concave Mirror Purpose: To determine how light behaves in a concave mirror Observations:

Rules for Concave Mirrors Lab 1. Outline mirror in book, and label Principle axis.

Rules for Concave Mirrors Lab 1. Outline mirror in book, and label Principle axis. 2. Shine light bulb of ray box at mirror. You should notice all the rays focus on 1 point (the focus). Mark and label this point F. 3. Measure the distance from the mirror to point F. Use this distance to mark C, a point on the other side of F. 4. Shine a single light ray through F at mirror. Copy the light beam path. 5. Shine a light ray parallel to the P. A. Copy the light beam path. 6. Shine a light ray through C. Copy the light beam path. 7. Shine a light hitting the vertex. Copy the light beam.

Analysis: 1. What happens when you shine a light ray through the focus (F)?

Analysis: 1. What happens when you shine a light ray through the focus (F)? 2. What happens when you shine a light ray parallel to the principle axis (PA)? 3. What happens when you shine a light ray through the centre of curvature (C)? 4. What happens when you shine a light ray at the vertex (V)?

Light Ray Rules for Concave Mirrors 1. A light ray parallel to P. A.

Light Ray Rules for Concave Mirrors 1. A light ray parallel to P. A. reflects through F. 2. A light ray that passes through F will reflect parallel to P. A. 3. A light ray hitting the vertex (perpendicular to P. A. ) will follow Өi & Өr reflection rule.

Using Light Ray Rules to Find an Image Case 1: An object outside C

Using Light Ray Rules to Find an Image Case 1: An object outside C Case 2: An object between C and F Case 3: An object on F Case 4: An object between F and Mirror

Locating Images in Curved Mirrors with Lab Benches

Locating Images in Curved Mirrors with Lab Benches

Concave Mirror Applications 1. A searchlight/car headlight - radiates light rays from focus to

Concave Mirror Applications 1. A searchlight/car headlight - radiates light rays from focus to reflect rays parallel (beam of light) 2. Satellite Dish - TV dish receives parallel rays and reflects them to focus where wave detector is 3. Cosmetic Mirrors - Large virtual images provide magnified face

• Worksheet

• Worksheet

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