Eli5: Why are the reflected images in concave mirror diagrams drawn as if it’s underneath the ground?

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Sorry if this seems like a dumb question, but I have trouble understanding the concave mirror diagrams.

For example, a candle is resting on the ground(the principal axis), they will draw the reflected candle as if it’s not even in the mirror and it’s underneath the ground. I get confused and ask myself, “How can a candle reflect in the ground? And how can the light rays go through the ground?”

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Anonymous 0 Comments

Why does the ground have to match the principal axis? I’m really confused about what you’re asking. Could you share a link to one of these images? I looked for concave mirror diagrams and didn’t find one yet.

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