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# Image formation by Convex and Concave Mirrors

The concave and convex Mirrors are carved out from a transparent sphere whose one surface is bulged outward or curved inward, one surface of the mirror is the reflecting surface and the other surface is made opaque by polishing it.

Image formation by Convex and Concave Lenses

Image formation by Convex and Concave Mirrors

Difference between Convex and Concave lenses

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## Image formation by Concave Mirror:

When an object is placed at infinity: The incoming parallel rays strike the mirror then the surface of the mirror reflected these rays to a point on the principal axis which is known as the focal point of the concave mirror resulting in the formation of a pointed image at the focal point of the concave mirror.

When an object is placed at the point beyond the centre of curvature: When an object is placed beyond the centre of the curvature, then a parallel beam of light strikes the mirror and passes through the focal point after the mirror reflected them. A beam of light also passes through the centre of curvature and is reflected back in the same way consequently a real image is formed between the centre of the curvature and the focal point which is of a size smaller than the object.

When an object is placed at the centre of curvature: When an object is placed at the centre of the curvature, then a parallel beam of light strikes the mirror and passes through the focal point after the mirror reflected them. A beam of light also passes through the next cardinal point, the focal point of the concave mirror, and is reflected back by the mirror parallel to the principal axis. consequently, a real and inverted image is formed at the centre of the curvature.

When an object is placed at the centre of curvature: When an object is placed between the centre of the curvature and the focal point then a parallel beam of light strikes the mirror and passes through the focal point after the mirror reflected them. A beam of light also strikes the mirror in such a way that it is reflected back in the same way and passes through the centre of the curvature. consequently, a real and inverted image is formed beyond the centre of the curvature which is of a size greater than the object.

When an object is placed at the focal point: When an object is placed at the focal point then a parallel beam of light strikes the mirror and passes through the focal point after the mirror reflected them. A beam of light also strikes the mirror in such a way that it is reflected back in the same way and passes through the centre of the curvature. consequently, a real and much larger image is formed at the infinity.

When an object is placed between the focal point and pole: When an object is placed between the focal point and pole then a parallel beam of light strikes the mirror and passes and is reflected back through the centre of the curvature after the mirror reflected them. A beam of light also strikes the mirror and passes through the pole which is reflected as per the rules of reflection, consequently a virtual and erect image is formed which is of a size larger than the object.

## Image formation by Convex Mirror:

When an object is placed at infinity: The incoming parallel rays strike the mirror then the convex mirror reflects them linearly with the focal point of the mirror resulting in the formation of a pointed virtual image at the focal point of the convex mirror.

When an object is placed at a finite distance: The incoming parallel rays strike the mirror then the convex mirror reflects them colinearly with the focal point of the mirror, since the object is near to the mirror 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 convex mirror. The size of the image is of smaller than the size of the object.→

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### NCERT Solutions for class 9 maths

 Chapter 1- Number System Chapter 9-Areas of parallelogram and triangles Chapter 2-Polynomial Chapter 10-Circles Chapter 3- Coordinate Geometry Chapter 11-Construction Chapter 4- Linear equations in two variables Chapter 12-Heron’s Formula Chapter 5- Introduction to Euclid’s Geometry Chapter 13-Surface Areas and Volumes Chapter 6-Lines and Angles Chapter 14-Statistics Chapter 7-Triangles Chapter 15-Probability Chapter 8- Quadrilateral

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 Chapter 1-Matter in our surroundings Chapter 9- Force and laws of motion Chapter 2-Is matter around us pure? Chapter 10- Gravitation Chapter3- Atoms and Molecules Chapter 11- Work and Energy Chapter 4-Structure of the Atom Chapter 12- Sound Chapter 5-Fundamental unit of life Chapter 13-Why do we fall ill ? Chapter 6- Tissues Chapter 14- Natural Resources Chapter 7- Diversity in living organism Chapter 15-Improvement in food resources Chapter 8- Motion Last years question papers & sample papers

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### NCERT Solutions for Class 10 Science

 Chapter 1- Chemical reactions and equations Chapter 9- Heredity and Evolution Chapter 2- Acid, Base and Salt Chapter 10- Light reflection and refraction Chapter 3- Metals and Non-Metals Chapter 11- Human eye and colorful world Chapter 4- Carbon and its Compounds Chapter 12- Electricity Chapter 5-Periodic classification of elements Chapter 13-Magnetic effect of electric current Chapter 6- Life Process Chapter 14-Sources of Energy Chapter 7-Control and Coordination Chapter 15-Environment Chapter 8- How do organisms reproduce? Chapter 16-Management of Natural Resources

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### NCERT Solutions for class 11 maths

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### 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

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