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You don't have any matches, so you want to focus sunlight to ignite a pile of twigs for a campfire. Which mirror would be best to use?
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You don't have any matches, so you want to focus sunlight to ignite a pile of twigs for a campfire. Which mirror would be best to use?

User Joanne Demmler
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1 Answer

3 votes
I believe it's the convex mirror. Hope this helps!

User Passionate Engineer
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