1.

An object of height 4 cm placed at 20 cm before the concave mirror of focal length 15cm. Find the magnification​

Answer»

height of object, h = 4 cm.object distance, U = 20cm.focal length, F = 15cm.first FIND image distance, V = ?by mirror formula,1/f = 1/v + 1/uthen, find magnification,m = h'/h = -v/u



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