Question

What is power lens if the focal lenth of a concave lens is 2m?

Answer 1

Answer:

focal length is given = 2m

focal length is given = 2mpower of lens p = 1/f

focal length is given = 2mpower of lens p = 1/fP = 1 /(-2) ( f is always taken it negative)

it negative)P = (-0.5)D (Ans)

Answer 2

ℏ✺ℓᾰ ժḙᾰԻ!!

P = 1/f

P = 1/-2

P = -0.5 D