Question

find focal length of lens of power -2•0D• what type lens it is​

Answer 1

POWER OF LENS = -2.0 DIOPTRE

LET THE FOCAL LENGTH OF LENS BE F

ALSO

POWER OF LENS =1/F

-2.0=1/f

F=1/-2

F=-0.5 METRE

SINCE THE FOCAL LENGTH OF THE GIVEN LENS HAS CAME IN NEGATIVE. THEREFORE IT IS A CONCAVE LENS

MARK AS BRAINLIEST