Simple Microscope

Can lenses be used as a visual aid ?
Lenses can be used to magnify smaller things, and to see distant objects clearly. Their uses as optical instrument are illustrated below: –

 Simple magnifier:
A simple magnifier consists of a converging lens. The lens is held such that object is adjusted between lens and its focus so that a virtual, magnified image is formed. For distinct vision, the image is adjusted to be at a distance of about. 25 cm (least distance of distinct vision for human eye = 25cm)

simple Microscope

Hence magnification is nearly $ \displaystyle m = (1 + \frac{25}{f}) $

Also Read :

Reflection of Light at a Plane Surface
Reflection at Spherical Surface & Mirror Formula
Lateral Magnification
Refraction of Light , Laws of Refraction , Relation between real and apparent depth
Refraction through Number of media
Total internal reflection
Refraction through a prism
Angle of minimum deviation & Prism Formula
Refraction at Curved surface
Lens maker’s formula
Combinations of Lenses
Compound Microscope

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