An object of height 2 cm is placed at a distance 20 cm in front of a concave mirror of focal length 12 cm. Find the position, size and nature of the image.

Given, Object height (O) = 2 cm Focal length (f) = 12 cm (negative) Object distance (u) = 20 cm (negative) Mirror formula: Substituting the values in the formula above we get, Hence, the image is formed at a distance of 30 cm in front of the mirror. Hence, length of image = 3 cm Image will be real, inverted and magnified.