Find the power of a concave lens of focal len | vedclass

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Question

(B) The focal length of a concave lens is taken as negative by sign convention.Given,focal length $f = -2 \,m$.The power of a lens is defined as the r

Vedclass · Accepted Answer

$-0.5$

Vedclass · Answer

(B) The focal length of a concave lens is taken as negative by sign convention.Given,focal length $f = -2 \,m$.The power of a lens is defined as the reciprocal of its focal length in meters,given by the formula $P = \frac{1}{f 	ext{ (in meters)}}$.Substituting the value: $P = \frac{1}{-2} = -0.5 \,D$.The negative sign indicates that the lens is concave (diverging).Therefore,the power of the given concave lens is $-0.5 \,D$.

Find the power of a concave lens of focal length $2 \,m$ in $Diopter$.

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