Question

Power of lens is -4d its focal length is_
please Ans with solution​

Answer 1

Answer:

ans is 0.25

Explanation:

p= -4

p=1/f

-4=1/f

f= 1/4

so f = 0.25

Answer 2

Answer:

mark me brain list ans

Explanation:

p=1/f

so f=1/p

put p=-4d in f=1/p

f=1/-4d Ans