Question

the power of a concave lens is -3.00 dioptre find the far point of a myopic eye​

Answer 1

Power,P= -3 D

Focal Length,f= 1/P=1/-3= -1/3 m

Far point,v= ?

Object distance,u= ∞

1/f=1/v-1/u

1/(-1/3)=1/v-1/-∞

-3=1/v-0

v=1/-3

v=-0.3m