Question

A person cannot see objects clearly when they are placed at a distance less than 30 cm from the eye what should be the power of the corrective lens and what type of lens is used to be correct the vision

Answer 1

hey mate!!

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♐ Person is suffering from hypermetropia as nearer objects are not clearly visible but far objects are clearly visible.

⚡❄️ It can be cured by using convex lens.

❄️⚡Given,

V=30cm(-)

u=-25cm

Now,

⚡Applying lens formula

1/f=1/v-1/u

1/f = 1/-30 -1/-25

1/f =1/150

♐F=150cm

Now,

❄️Power = 1/f = 1/150 ×100(in m)

♐=O.6 dioptre

Hope it will help you...

Phoenix

Answer 2

the person is suffering from hypermetropia and the corrective lens can be convex lens because convex lens can converge the image and make sure the image falls on retina