Question

6. Power of a lens is -1.5 D. Find its focal length.​

Answer 1

Answer:

Given,

P=-1.5D

We know that,

P=1/f

-1.5=1/f

f=-1/1.5

f= -0.67metre

Answer 2

Answer:

Focal length (in meters)=1/power of the lens,

1/-1.5=-0=. ,-0.666cm