Question

The far point of a myopic person's far
point is 400 cm. What should be the
focal length of remedial lens of this
person?​

Answer 1

Answer:

mark brainliest answer.

Explanation:

→ the remedial lens should make the objects at infinity at far point.

→ therefore,

→ for object at infinity, u = -∞

→ Far point distance of defected eye,v = 400 cm

→ using lens formula

→ 1/f = 1/y - 1/u

→ 1/400 - 1/-∞

→ 1/400 + 0

→ f = 400 cm

→ power,p = 1/f(in m) = 1/4 = 0.25 D

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