Question

A lens +2D power is kept in contact of a -1D power lens.this lens combination will have which characterstic?

Answer 1

hey buddy here is the answer !!!

so, D1 + D2 = D
+2 + (-1) =D
2-1 = D
D = 1 dioptre
this is concave lens ..

hope this helps !!

Answer 2

Here....
Hope it helps you....