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What focal length should the reading spectacles have for a person for whom the least distance of vision is 50 cm ? (The distance of Normal vision is 25 cm)

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detailed solution

Correct option is A

Near point = v = –50cm
Object distance = u = –25cm
1v1u=1f1501(25)=1f150+125=1f1f=1+250=150f=50 cm

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detailed solution

Correct answer is 1

Near point = v = –50cm
Object distance = u = –25cm
1v1u=1f1501(25)=1f150+125=1f1f=1+250=150f=50 cm

Talk to our academic expert!

+91

Are you a Sri Chaitanya student?

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