Question

Which of the following is incorrect about compound microscope?

• A. It consists of two convex lenses
• B. The objective has smaller focal length than the eyepiece
• C. The objective forms a real magnified image
• D. The final image is real and much magnified

Answer 1

The correct option is D The final image is real and much magnified

A compound microscope is an optical instrument consisting of two convex lenses. It on the principle that when a tiny object to be magnified is placed just beyond the focus of its objective lens, a virtual, inverted and highly magnified image of the object is formed.

A compound microscope consists of two convex lenses: an objective lens O of small aperture and an eye piece E of large aperture. The objective and the eye piece have short focal length.

In this case, the objective lens O of the compound microscope forms a real, inverted and enlarged image A’B’ of the object.