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Question

A combination of two lenses with power 1D and 2D is there. What is the total power?


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Solution

Step 1: Given data:

Power of Lenses in contact

The power of n number of lenses in contact is equal to the algebraic sum of the power of n individual lenses.

Given, Powers,

P1=1DP2=2D

Step 2: Calculation:

So,

P=P1+P2P=1+2P=3D

Here, P is total power.

Hence, the total power of a combination of two lenses with power 1D and 2D is 3D.


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