Question

A 4 cm tall object kept in front of a concave lens of focal length 20 cm at a distance of 30 cm from the lens find the position

Answer 1

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❥Couple is confused when photo goes viral, until they look closer. When image height and focal length are equal the lines drawn parallel to both points will meet at infinity. Hence the position of image will be at infinity means the position is indefinite. A concave mirror has a focal length of 15 cm.

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