Question

A lens produces a 3 times magnified image of an object at 15 cm on a screen. At what distance should object be placed to get a 3 times magnified erect image? a.-6 cm b.+5cm c.-5 cm d.+6 cm​

Answer 1

Answer:

Explanation:

Object distance should be less than the focal length for the formation of an erect image. Hence, the range of distance of object from the mirror should be less than 15 cm i.e. from 0 to 15 cm in the front of mirror from the pole. The nature of image so formed will be virtual and erect. The size of the image will be larger than object. Ray diagram is attached as image to the question.