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I'm standing in front of a concave mirror, but I can't see my image behind the mirror. What is my probable position of standing?

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JEE main 2020 , 7th Jan 1st session class 11 solution

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Physics
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As soon as a hunter shoots a monkey on the top of a tree, it falls down vertically.will the bullet hit monkey?

What will be the minimum height of a plain mirror so that a "h" ft tall man can see his full image?