Question

the far point of a myopic person is 70cm in front of the eye . calculate the focal length and power of the lens needed by him to see the distance objects clearly?​

Answer 1

Answer:

Explanation:distance=70cm far

So that he take -70power of lence

Answer 2

In case of myopia , we use a concave lens to form to form the image of an object on infinity at the far point of the eye.

1/v - 1/u = 1/f

1/u = 1/infinity = 0

So , v=f= -70cm

I hope it helps..thank you