A screen placed 90cm away from an object The image of the object on the screen is formed by - Physics - Nuclei

Question

A screen placed 90cm away from an object The image of the object on
the screen is formed by a convex lens at two different locations
seperated by 20 cm Determine the focal length of the lens

Ankur · Accepted Answer

Kindly refer to the link given below to get your answer :

https://www meritnation
com/ask-answer/question/a-screen-is-placed-90-cm-from-an-object-the-image-of-the-o/ray-optics-optical-instrument/6328971

A screen placed 90cm away from an object. The image of the object on the screen is formed by a convex lens at two different locations seperated by 20 cm. Determine the focal length of the lens.