Combination of Lenses & Power of Lenses Class-12th Physics

 Physics

Class-12
CBSE/ICSE/IB Board/BSEB Bihar/ All Indian Boards/IIT-JEE/NEET
Optics
Lecture-22
Ray Optics
Power of a Lens and Combination of Lenses                                               Power of a Lens :
1. Definition of power of lens
2. Measurement of power of lens
3. Expression for power of lens
4. SI Unit of power of lens
5. Definition of dioptre (D)
6. Sign of power of lens

Combination of Lenses :
1. Introduction
2. Kinds of combination of lenses :
    (a) When two thin lenses are in contact
    (b) When two thin lenses are separated by a distance (d)
3.Equivalent focal length of combination of lenses
4. Expression for equivalent focal length
5. Derivation of expression for equivalent focal length
6. Ray diagram
7. Derivation

BY SHIVANAND CHOUDHARY

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