Answer:
Revolving Nosepiece or Turret: This is the part that holds two or more objective lenses and can be rotated to easily change power.
The revolving nosepiece holds and revolves the objective lenses. This part of the microscope is a knob that can be twisted and turned. ... Objective lenses have different magnification powers such as scanning (4x), low power (10x), high power (40x), and oil immersion objectives (100x).
