How is a mirror fixed in a microscope? Share with your friends Share 0 Amey Goel answered this It contains a plane mirror on one side and a concave mirror on the other side. Mirror is used to reflect light rays into the microscope. 1 View Full Answer Hema answered this It contains a plane?mirror?on one side and a concave?mirror?on the other side.?Mirror?is used to reflect light rays into the?microscope.? 0