Why is the magnifying glass round? The relationship between the object distance and the image distance when the magnifying glass forms an image

Some friends must be curious, why are the magnifying glasses we see in life round? In fact, it is not the case. The shape of a magnifying glass can be rectangular, square, or round. Such magnifying glasses are mainly used to look at a place for a long time. Isn't it interesting? Then let's learn more about magnifying glasses!

Contents of this article

1. Why is the magnifying glass round?

2. The relationship between object distance and image distance when imaging with a magnifying glass

3. What kind of garbage does a magnifying glass belong to?

Why is a magnifying glass round?

The circle allows for the largest viewing angle.

The shape of the magnifying glass can be rectangular, square, or round. Such a magnifying glass is mainly used to look at one place for a long time.

Definition of magnifying glass: A simple visual optical device used to observe tiny details of objects. It is a converging lens with a focal length much smaller than the eye's clear vision distance.

The relationship between object distance and image distance when imaging with a magnifying glass

The relationship is as follows:

1. When the object distance is greater than twice the focal length, the image distance is greater than one times the focal length and less than twice the focal length.

2. When the object distance is equal to twice the focal length, the image distance is equal to twice the focal length.

3. When the object distance is greater than one times the focal length and less than two times the focal length, the image distance is greater than two times the focal length.

4. When the object distance is equal to one focal length, no image is formed.

5. When the object distance is less than one focal length, a virtual image is formed, and the virtual image is farther from the lens than the object distance.

What kind of garbage does a magnifying glass belong to?

Recyclable garbage refers to household waste that is suitable for recycling and can be reused, such as waste paper, waste plastic, waste glass products, waste metal, and waste fabric. Recyclables should be placed gently, clean and dry to avoid contamination; waste paper should be kept as flat as possible; three-dimensional packaging should be emptied of its contents, cleaned and flattened before placement; those with sharp edges should be wrapped before placement.