Q. 8 C4.2( 21 Votes )

Solve the following examples.

Three lenses having power 2, 2.5 and 1.7 D are kept touching in a row. What is the total power of the lens combination?

Answer :

As per the given question three lenses having power 2, 2.5 and 1.7 D are kept touching in a row.


So resultant power will be


P=P1+P2+P3


P= 2+2.5+1.7


P= 6.2D


The resultant combination 6.2D is of convex lens and it will produce a converging effect.


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