Question

where an object should be placed before a concave mirror of focal length 20cm so that real image is formed at a distance of 60cm from it?​

Answer 1

Answer:

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Explanation:

where an object should be placed before a concave mirror of focal length 20cm so that a real image is formed at a distance of 60cm from it? Object Distance (u) = ? So, the object must be placed between Centre of Curvature and Focus at the distance of 30 cm from the mirror.