Question

Explain the construction and working of a compound microscope with a neat ray-diagram,Answer the given question in detail.

Answer 1

Microscopes used in homes, schools, and professional laboratories are actually compound microscopes and use at least two lenses to produce a magnified image. There's a lens above the object (called the objective lens) and another lens near your eye (called the eyepiece or ocular lens).

Answer 2

Construction-A compound microscope consists of two convex lenses. The lens towards the object is called an eyepiece. The lenses are so close that the focal length of the objective lens is small compared to the eyepiece. This combination of lens forms a magnified lenses forms a magnified image of object.

Working-The object AB is placed at a distance slightly more than length of the objective so that it’s real,inverted & magnified image A’B’ is obtained beyond the centre of Curvature (C) of the objective lens. The image A’B’ becomes an object for the eyepiece. The position of image A’B’ is adjusted such that it lies within the focal length of eyepiece. The piece forms a virtual,erect & magnified image A’’B’’ of the object.

   Thus, The final image formed by a compound microscope is virtual,inverted & magnified behind the object