Future Study Point

# Image formation by Convex and Concave Lenses

The concave and convex lenses are the spherical lenses that are bounded by two spherical transparent surfaces. The concave lens is made by binding together two transparent spherical surfaces which are curved inward while the convex lens is made by binding together two transparent spherical surfaces which are curved outward. Here we have explained how the image is formed by both the lens concave and convex.

You can also study

Click for online shopping

Future Study Point.Deal: Cloths, Laptops, Computers, Mobiles, Shoes etc

Difference between Convex and Concave lenses

Image formation by Concave and Convex Mirrors

Why does the Sun appears reddish in the evening and morning: Complete Detail

## Image formation by Concave Lens:

When an object is placed at infinity: The incoming parallel rays strike the lens then the concave lens diverges them resulting in the formation of a virtual image at the focal point of the concave lens.

When an object is placed at a finite distance: The incoming parallel rays strike the lens then the concave lens diverges them, since the object is near to the lens therefore some of the incoming rays pass through the optical centre which results in the formation of the image between optical centre and focal point of the concave lens. The size of the image

## Image formation by Convex Lens:

When an object is placed at infinity: The incoming parallel rays strike the lens then the convex lens converges them to its focal point resulting in the formation of a real and pointed image at the focal point of the convex lens.

When an object is placed at the point beyond the centre of curvature(2F1): When an object is placed beyond the centre of the curvature, then a parallel beam of the light strikes the lens and passes through the focal point after refraction. A beam of light also passes through the optical centre consequently image is formed between the centre of the curvature and the focal point.

When an object is placed at the point beyond the centre of curvature: When an object is placed at the centre of the curvature, then a parallel beam of the light strikes the lens and passes through the focal point after refraction. A beam of light also passes through the optical centre consequently a real image of the same size is formed at another centre of the curvature.

When an object is placed between the centre of curvature and focal point: When an object is placed between the centre of curvature and focal point, then a parallel beam of the light strikes the lens and passes through the focal point after refraction. A beam of light also passes through the optical centre consequently a real image of the size larger than the object is formed behind the centre of the curvature.

When an object is placed at a focal point: When an object is placed at the focal point, then a parallel beam of the light strikes the lens and passes through another focal point after refraction. A beam of light also passes through the optical centre consequently a real image of a much larger size is formed at the infinity.

When an object is placed between focal point and the optical centre: When an object is placed between the focal point and the optical centre, then a parallel beam of the light strikes the lens and passes through another focal point after refraction. A beam of light also passes through the optical centre consequently a virtual image of larger size is formed behind the centre of the curvature.

### Science  Notes

Functioning of Soda-Acid Fire Extinguisher

What is DDT?

Structure and Function of Cell : Cell Biology

Three laws of motion

Archimedes Principle: Complete detail

Average Speed and Average velocity

Three equation of Motions

Recoil velocity of the gun

Mole concept

The second  law of motion

The universal  law of gravitational force

Thrust and Pressure : Difference

Evoporation,Vapourization and Latent heat

Important salts class 10 CBSE sceience notes

Reflection, Refraction, Dispersion, and Scattering

Atom, Molecule, and Atomicity

Determining Valency, Net Charge and Molecular Formula

Ozone Layer and How it is Getting depleted.

Human Eye – Structure and functions

Myopia, Hypermetropia, and Presbyopia

Why do the star twinkle?

Electric Current and Heating effect of Electric Current

Complete detail of electrical resistance and conductance

Type of Chemical Reactions with Complete detail

Class 10 chemistry Viva Voce Questions and Answers for CBSE Board 2020-21

What are the physical and chemical properties of metals?

### Important maths notes

Tricks – How to write linear equations

Tricks- How to solve question from algebraic equations

Three ways of solving quadratic equation

Mean, Mode and Median

Solutions- Specific questions of mensuration

Finding the roots of the polynomial by Complete square method

Technics – Achieving 100% marks in Maths

You can compensate us

Paytm number 9891436286

The money collected by us will be used for the education of poor students who leaves their study because of a lack of money.

## NCERT Solutions of Science and Maths for Class 9,10,11 and 12

### NCERT Solutions for class 9 science

CBSE Class 9-Question paper of science 2020 with solutions

CBSE Class 9-Sample paper of science

CBSE Class 9-Unsolved question paper of science 2019

### NCERT Solutions for class 10 maths

CBSE Class 10-Question paper of maths 2021 with solutions

CBSE Class 10-Half yearly question paper of maths 2020 with solutions

CBSE Class 10 -Question paper of maths 2020 with solutions

CBSE Class 10-Question paper of maths 2019 with solutions

### Solutions of Class 10 Science Sample Paper and Question Papers for Term-1 and Term 2 2021-22 CBSE Board

Solution of Class 10 Science Question Paper Preboard 2021-22:Term 2 CBSE Board Exam

Solutions of Class 10 Science Sample Paper Term-1 2021-22 CBSE Board

Class 10 Science Sample Paper for Term 2 CBSE Board Exam 2021-22 with Solution

Solutions of Class 10 Science Question Paper Preboard Examination (First) 2021 -22 Class 10 Science

CBSE Class 10 – Question paper of science 2020 with solutions

CBSE class 10 -Sample paper of Science 2020

### NCERT Solutions for class 11 maths

 Chapter 1-Sets Chapter 9-Sequences and Series Chapter 2- Relations and functions Chapter 10- Straight Lines Chapter 3- Trigonometry Chapter 11-Conic Sections Chapter 4-Principle of mathematical induction Chapter 12-Introduction to three Dimensional Geometry Chapter 5-Complex numbers Chapter 13- Limits and Derivatives Chapter 6- Linear Inequalities Chapter 14-Mathematical Reasoning Chapter 7- Permutations and Combinations Chapter 15- Statistics Chapter 8- Binomial Theorem Chapter 16- Probability

CBSE Class 11-Question paper of maths 2015

CBSE Class 11 – Second unit test of maths 2021 with solutions

### NCERT solutions for class 12 maths

 Chapter 1-Relations and Functions Chapter 9-Differential Equations Chapter 2-Inverse Trigonometric Functions Chapter 10-Vector Algebra Chapter 3-Matrices Chapter 11 – Three Dimensional Geometry Chapter 4-Determinants Chapter 12-Linear Programming Chapter 5- Continuity and Differentiability Chapter 13-Probability Chapter 6- Application of Derivation CBSE Class 12- Question paper of maths 2021 with solutions Chapter 7- Integrals Chapter 8-Application of Integrals

Class 12 Solutions of Maths Latest Sample Paper Published by CBSE for 2021-22 Term 2

Class 12 Maths Important Questions-Application of Integrals

Class 12 Maths Important questions on Chapter 7 Integral with Solutions for term 2 CBSE Board 2021-22

Solutions of Class 12 Maths Question Paper of Preboard -2 Exam Term-2 CBSE Board 2021-22

Solutions of class 12  maths question paper 2021 preboard exam CBSE Solution