Question

the power of o convex lens od focal length 25cm.................. a) +4.0
b) 0.25
c) -4.0
d) -0.4​

Answer 1

25cm = 0.25 m

P=1/f

P=1/0.25

P=100/25

P=+4D

Option (a) is correct.

__________

@zaqwertyuioplm :)

Answer 2

Answer:

ANNEYONGHASEYO

THE CORRECT ANS IS OPTION A