# Difference Between Convex and Concave Lens

Knowing the difference between convex and concave lens is one of the confusing topics for students in the field of optics. In this article, we will learn all the major and minor differences between the convex lens and concave lens.

Lenses are devices that transmit light and modify its path due to refraction. They are transparent and can be used to converge or diverge light.

Simple lenses consist of only one type of medium and are curved. Based on curvature, they are classified as a convex lens or a concave lens.

Related Topic: Biconvex Lens

Index

## Difference Between Concave Lens and Convex Lens

Here, we have listed out the difference between concave lens and convex lens in a single table.

## Image Formation Diagrams

Now, let’s look into various images formed by these two lenses on various conditions, which will further help us to find the difference between convex lens and concave lens.

## FAQs

What are the uses of convex and concave lenses in vision correction?

Convex lenses are used to correct farsightedness (hypermetropia).
Concave lenses are used to correct nearsightedness (myopia).

What are the different types of convex lens?

The different types of convex lens are:
1. Plano-convex lens: It has one plane side and one convex side.
2. Biconvex (or just convex) lens: It is convex on both sides.
3. Concavo-convex lens: It is concave on one side and convex on other side.

What are the different types of concave lens?

The different types of convex lens are:
1. Plano-concave lens: It has one plane side and one concave side.
2. Biconcave (or just concave) lens: It is concave on both sides.
3. Convexo-concave lens: It is convex on one side and concave on other side.

How can you tell apart a concave and convex lens without feeling its surface?

We can tell apart a convex and concave lens without touching its surface as follows.
We pass a stream of light from a distant source (like the Sun) onto the lens. Then we put a paper in front of the lens and adjust its position.
– If a small point image is formed, the lens is convex.
– If no image is formed despite adjusting position, the lens is concave

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