A person cannot see distinctly objects kept b | vedclass

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(A) The person is suffering from myopia (nearsightedness) because they cannot see distant objects beyond $2\, m$. To correct this defect,a concave len

Vedclass · Accepted Answer

$-0.5$

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(A) The person is suffering from myopia (nearsightedness) because they cannot see distant objects beyond $2\, m$. To correct this defect,a concave lens is used. The focal length $(f)$ of the required lens should be equal to the far point of the person,which is $-2\, m$ (negative because it is a concave lens). The power $(P)$ of a lens is given by the formula $P = 1/f$ (in meters). Substituting the value: $P = 1 / (-2) = -0.5\, D$. Therefore,the correct power of the lens is $-0.5\, D$.

$A$ person cannot see distinctly objects kept beyond $2\, m$. This defect can be corrected by using a lens of power ........ $D$.

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