- Introduction
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- Refraction through a rectangular glass slab
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- Laws of refraction of light
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- The Refractive Index
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- Refraction by Spherical Lenses
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- Image Formation by Lenses
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- Image Formation in Lenses Using Ray Diagrams
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- Sign Convention for Spherical Lenses
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- Lens Formula and Magnification

- Ray diagram helps us to study the nature, position and relative size of the image formed by lenses.
- For drawing ray diagrams we first consider how light rays falling on both concave and convex lens in three different ways get refracted.
- First consider the case for convex lens

- Secondly consider the case for concave lens

- The ray diagrams for the image formation in a convex lens for a few positions of the object are summarized below in the table

- The ray diagrams for the image formation in a concave lens for a few positions of the object are summarized below in the table

Class 10 Maths Class 10 Science