Ray Diagrams in Convex mirrors

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# Ray Diagrams in Convex mirrors - PowerPoint PPT Presentation

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### Ray Diagrams in Convex mirrors

Optics

SNC 2DO

Convex Mirrors

Reflecting surface curves outward

Convex mirrors have their focal point and centre behind the mirror

Make a small, virtual image of the original object

Drawing Ray Diagrams – convex mirrors

Rule #1 - In the diagrams the rays will be extended behind the mirror as dotted lines to be able to show how they pass through F or C

Drawing Ray Diagrams – convex mirrors

Rule #2: draw the ray coming off of the tip of the object parallel to the principle axis

- when it hits the mirror, it bounces off so that a dotted line drawn behind the mirror will pass through the focal point

Drawing Ray Diagrams – convex mirrors

Rule #3- This ray comes off of the tip of the object and to the thecentre.

Where it hits the mirror it will bounce back, but I draw a dotted line behind the mirror to show where the ray would have gone.

Drawing Ray Diagrams – convex mirrors

The image will appear at the point where the 2 dotted lines connect.

Problems

1: A convex mirror has a radius of 20 cm. An object is placed 30 cm in front of the mirror. Determinewhere the image will appear.

2: For the same situation from Example 1, determine how tall the image is if the object is 5.0 cm tall. Also determine the magnification.