Question

Describe the construction and working of a
compound microscope. Draw a neat labelled
ray diagram​

Answer 1

$\large\boxed{\fcolorbox{blue}{yellow}{Answer:-}}$

$\bf\large\underline\red{Construction:-}$

A compound microscope consists of two converging lenses or lensnsystems mounted coaxially at the two ends of anmetal tube. One of the lens systems, called the objective, has a short focal length, fo, and small aperture. The second converging lens system at a convenient distance, called the eyepiece or ocular, has a somewhat larger focal length, fe, and larger aperture.

$\bf\large\underline\red{Working:-}$

The objective is adjusted so that the sample AB to be examined is just outside its focal length. The objective then forms a real, inverted, and magnified image, A1 B1. By proper adjustment of the object distance, this image is formed just inside the focal length of the eyepiece.

The image A1 B1 now serves as the real object for the ocular. The ocular, performing the function of a simple magnifier, forms a virtual, highly magnified image A2 B2 which is inverted relative to the object AB. In normal adjustment, the proper object distance is that for which this final image is formed at the near point of the eye.