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Compound Microscope :

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It is made up of two convex lenses, as shown in the figure VI; the lenses of shorter focal length and size facing the object OP is called the objective; the other lens called eye piece, is of greater focal length (fe> fo) and larger size. The eye is taken to be at the position of the centre Ce of eye-piece.

The object is held in between fo & 2fo hence objective produces real, inverted and magnified image R'S' which is called intermediate effect, which acts as the object for the eyepiece. The eye-piece produces virtual and erect image RS as R'S' is within its focal length - i.e. eye-piece acts as a magnifying glass.

Index

Light

16.1 Laws of Reflection at plane surfaces
16.2 Mirrors
16.3 Laws of Refraction at plane surfaces, Refractive Index and Critical Angle
16.4 Refraction at curved spherical surfaces and Lens makerís formula
16.5 Lenses
16.6 Refraction in Prisms, Prism Formula
16.7 Dispersion of Light, Angular Dispersion and Dispersive Power
16.8 Optical Instruments and Magnifying Power

Chapter 17





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