question_answer

Which of the following is/are correct (a) Convex lens is used in making search lights and spot lights in theatres (b) Convex lens is used as a magnifying glass (or) simple microscope (c) Convex lens is used in terrestrial telescope for erecting the inverted image formed by the objective lens of the telescope (d) Concave lens is used in spectacles for the correction of hyper metropia

Answer:

(a), (b), (c)