Question

A person wear eye glass of focal length 70 cm .what is the far point of the person

Answer 1

Answer:

The far point of the person will be 70 cm

Explanation:

Given focal length of the lens = -70 cm

u = -∞

From the lens formula we know that,

1/f = 1/v - 1/u

=> 1/-70 = 1/v - 1/-∞

=> 1/-70 = 1/v - 0

=> 1/-70 = 1/v

=> v = -70 cm

Hence the far point of the person will be 70 cm

I hope this answer helps you, please feel free to ask any doubts regarding this in the comment section.

Answer 2

Answer:

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hope it helps u