What is Lens

It is a transparent glass

it is bound by 2 spherical surfaces

Hence, if 2 glass spheres are joined together, they form a lens


What are Different Types of lens

They are of 2 types

Types of Spherical Lenses - Teachoo.jpg

Concave Lens

It is thin in center but thicker at the edges


Convex Lens

It is thick in middle but thinner at the edges


Real life images of Concave and Convex Lens look like

Concave and Convex lens - Real life.jpg



NCERT Question 1 - Which one of the following materials cannot be used to make a lens?
(a) Water (b) Glass (c) Plastic (d) Clay

View Answer

  1. Class 10
  2. Chapter 10 Class 10 - Light - Reflection and Refraction

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.