Afar-sighted person has a near-point of 80 cm. to correct their vision so that they can see objects that are as close as 10 cm to their eye, what should be the focal length of the prescribed lens? assume the lens will be 2 cm from the eye.
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Ответ:
Explanation:
As we know that Far sighted person has near point shifted to 80 cm distance
so he is able to see the object 80 cm
now the distance of lens from eye is 2 cm
and the person want to see the objects at distance 10 cm
so here the image distance from lens is 80 cm and the object distance from lens is 8 cm
now from lens formula we have
Ответ: