Question

how will you calculate the focal length of bi convex lens used to correct the defect of hypermetropia ? explain it mathematically ​

Answer 1

Answer:

1+2

Explanation:

because 1 is a natural number and even 2.

Answer 2

Answer:

Explanation:

Hypermetopia :- A long sighted eyes can see distant objects clearly but nearer objects are not clear visible .

it means Person who face this defect

see clearly of object placed in infinite .

e.g u = -∞ ( negative sign indicate object placed left side of lens )

use formula,

1/v - 1/( -∞) = 1/f

v = f

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