Question

The focal length of a lens whose power is -1.5 D is 1. -66.66 cm 2. + 1.5 m 3.+ 66.66 cm 4.-1.5 m​

Answer 1

Answer:

Gambhare gambhare

Answer 2

Answer:

Anwer is (c) +66.66

Power of a lens = 1/F

So, F=1/P = 1/-1.5= -66.66

But focal length of any lens is always +ve.

So, the ans. is +66.66