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Three lenses having power 2, 2.5 and 1.7...

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?

Text Solution

Verified by Experts

The correct Answer is:
Given: `P_1 = 2D`
`P_2=2.5 D`
`P_3=1.7 D`
To find : `P_("total")= ?`
Formula : `P_("total")= P_1+ P_2+ P_3`
`P_("total")= P_1+P_2+P_3`
`therefore P_("total") =2+2.5+1.7`
`therefore P_("total")=6.2 D`
Total Power of combination is 6.2 D.
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