Question

The power of lens is -1.5D.find the focal length and state its nature

Answer 1

p= 1/f so f =1/p= 1/ -1.5= -0.667 and lens is concave

Answer 2

Answer: -66.6cm

Explanation: P=1/f

P= -1.5D

-1.5=1/f

F=1/-1.5

F=0.6667m

F is in meter we have to convert it

So, F=66.6cm