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

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Presentation on theme: "Learning Outcome Draw a ray diagram to find the position, nature and size of the image produced by a concave and convex mirrors."— Presentation transcript:

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

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

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

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

5 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

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

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

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

9 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

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


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