Question

The lens of power minus 1. 5 D and + 2. 5 + then contact the focal length of combination will be

Answer 1

$<I><b><a>Hey there ✔✌✌⭐☺⭐⭐☺⭐⭐☺⭐⭐☺⭐⭐☺⭐ here is the answer....... .$
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☀The power of a combined lences are the sum of the power of individual lense...

☀such that .... when P is the power of combined lences and P1, P2,P3..
.are the individual power ....then we get

☀P= P1 +P2 +P3+P4.......On

✨ATQ,

P= 1.5 D + 2.5 D
= +4.O D (answer)

hope it helps you ✔✔✌✌⭐☺⭐⭐☺⭐⭐☺⭐⭐☺⭐