Question

What Is Power of Combination of Lens ?​

Answer 1

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Power of combination of lenses : The focal length of the combination of two lenses placed in contact is given by the relation. Thus the power of combination of lenses is the algebraic sum of the powers of individual lenses. 1. A lens is formed by combining two thin lenses of powers + 12 D and – 8 D in contact with each other.

Answer 2

Answer:

Thus the power of the combination of lenses is the algebraic sum of the powers of individual lenses. If twolenses are separated by a distance d metre, then the power of thecombination of lenses is given by a relation. P=p1+p2−d⋅(p1⋅p2)