A convex lens forms a real and inverted image of a point object at a dis†an ce 50 cm from the convex lens.A concave lens is placed 10 cm behind the convex lens on the image side.On placing a plane mirror on the image side and facing the concave lens it is observed that the finalimage now coincides with the object itself.The focal length of the concave lens is?

A convex lens forms a real and inverted image of a point object at a d

1.	A convex lens forms a real and inverted image of a point object at a dis†an ce 50 cm from the convex lens.A concave lens is placed 10 cm behind the convex lens on the image side.On placing a plane mirror on the image side and facing the concave lens it is observed that the finalimage now coincides with the object itself.The focal length of the concave lens is?
Answer» A convex lens forms a real and inverted image of a point object at a dis†an ce 50 cm from the convex lens.A concave lens is placed 10 cm behind the convex lens on the image side.On placing a plane mirror on the image side and facing the concave lens it is observed that the finalimage now coincides with the object itself.The focal length of the concave lens is?