Question

♡ If two lenses
lenses of Power 1.5Dand 0.1D is contect then effective power of combination is:
1.2.5D
d) 3.250
a) 2.5D
0.5 D​

Answer 1

P = P1 + P2

P = 1.5 + 0.1

P = 1.6 D

I think you type wrong option.