Tell me how to use a magnifying glass correctly

How to use a magnifying glass correctly There are two main ways to use a magnifying glass correctly:

1. One is to place the object to be observed in a fixed position, and then put the magnifying glass Get close to one side of the object, and then slowly move the magnifying glass along the straight line between the naked eye and the object until you can see the fine structure of the object clearly;

2. Another method is to place the magnifying glass In a fixed position, place the object to be observed under the magnifying glass (close to the magnifying glass), and then slowly move the object along the straight line between the naked eye and the magnifying glass until the fine structure of the object is clearly seen.

The English name of magnifying glass: magnifier, a simple visual optical device used to observe minute details of objects. It is a converging lens with a focal length much smaller than the clear vision distance of the eye. The size of an object imaged on the retina of the human eye is proportional to the angle (viewing angle) of the object to the eye.