two thin lens of power +6D and -2D are in contact.what is the focal length of the combination?
Answers
Answered by
1
So....
Given, P1=6D
and, P2=(-2D)
So total power:-
P1+P2=6D+(-2D)
=6D-2D
=4D....
So the final power is 4D.
Similar questions