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## Class 12 Physics (India)

### Course: Class 12 Physics (India) > Unit 9

Lesson 6: Refraction in thin lenses- Convex lenses
- Convex lens examples
- Concave lenses
- Paths of light rays through spherical lenses
- Image formation in spherical lenses
- Thin lens intuition
- Thin lens formula
- Solved example on lens formula
- Using magnification formula for lenses
- Using the lens formula
- Convex and concave lenses
- Thin lenses questions
- Virtual Object
- Thin lens formula - virtual object
- Worked example: Image formed by multiple lenses
- Image formed by multiple lenses
- Lens makers formula
- Solved example: Lens makers formula
- Sign convention: radii of curvature (lens maker's formula)
- Power of lens
- Power of lens
- Thin lenses in contact
- Thin lens sign conventions

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# Sign convention: radii of curvature (lens maker's formula)

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