Question

two concave lens have same dimentions but made with different materials they from image at some distance when object is at infinite distance .give reason​

Answer 1

Answer:

A double convex lens made of glass of refractive index 1.56 has both radii of a curvature of magnitude 20cm. If an object is placed at a distance of 10cm from this lens, how would one find the position of the image formed? ... A real image that is twice its object is formed by a convex lens with the focal length of 30 mm..

Answer 2

Answer:

please check the attached image,