Answer to Question #55099 in Optics for shivam

Question

why it is necessary to use a telescope to observe fringe pattern in a michelson interferometer but a microscope is needed to observe the newton ring

Answer 1

Optical device that increases the ring and focus on the near distance is needed for consideration of Newton's rings. Optical device that focus to infinity is needed for michelson interferometer. And for the interferometer optical device Maykilson need focus to infinity.