Question

Find the power of lens whose focal length is -100m also name the lens

Answer 1

$\sf{\large{\underline{\underline{EXPLANATION}}}}$

$\sf{Given}\begin{cases}\sf{f=-100m}\\ \sf{p=??}\end{cases}$

$\textbf{\underline{Using formula of lens power,,}}</p><p>$

$\mathtt{\boxed{\blue{p=\frac{1}{f}}}}$

$\sf{\implies{p=\frac{1}{-100}}}$

$\sf{\implies{p=-0.01D}}$

Since,,f is negative,, therefore the lens is concave.

Hope it helps ❣️❣️❣️