BY Team Aakash Byju's

Refraction and Lenses: CBSE Class 12 Physics Chapter-9 Notes

CBSE Class 12 Chapter 9 in Physics is on Ray Optics and Optical Instrument.

 Let us see some important notes on refraction and lenses below:

 Refraction of light - Along with its definition and examples, we need to concentrate on some of the terms like:

Reflective index, Snell’s law (law of refraction), refraction through a curved surface, total internal reflection, double refraction from a plane surface.

 Also, do not ignore  these - single refraction from a plane surface, the relationship between object distance & image distance refraction, and linear magnification for spherical refracting surfaces.

Distinguish between a thin lens and a standard lens. Some of the main terms related to the lens are:

Lens 

Centre of curvature & radius of curvature, principal axis, optical center, principal focus, and focal length.

Prisms, optical instruments, eyes, simple microscopes, and telescopes are some topics that you can study in the end.

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