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Mistake Master · AP Physics 2 · Unit 13 · Step-Through Animation

The Sign Is the Answer

You'll learnwhere a mirror's image actually sits, what a negative image distance is telling you, and which of the two signs carries size and which carries orientation.

Stand two metres from a mirror and your image is not on the glass - it is two metres behind it. Curved mirrors answer with signed numbers, and every sign is a fact about the image. Eleven short steps; press Next for each one.

11 STEPS · 6 QUICK CHECKS · BEHIND THE GLASS · A SIGN IS A SIDE · v2

the image is behind the glass · a negative distance is a side
Before you start
What you're looking at
First a plane mirror with a figure in front of it, then a curved mirror on an axis with an object arrow and the rays that locate its image.
The question
Where is the image really, and what do the two signs in the answer each mean?
Step 1 / 11