Question

Two lenses of power -1.50 and +2.5D are placed in
contact. The focal length of combination will be-
A)1m
(B) 5m
(c) 10m
(D) 20m

Answer 1

Answer:

Heyaa mate....the answer of ur question is c) 10m

Answer 2

option (a) 1m.

(2.50 - 1 .50)

1 D.

so,

P = 1 / f

f = 1 / P

= 1 /1

= 1m.

hope this helps you...!!

#BAL