Question

Find the focal length value to - 1.5 D lens ?

Answer 1

Explanation:

Here,, Power of lens,P=-1.5D

we know,,

Focal length,

$\mathbf{\boxed{\blue{f=\frac{1}{P}}}}$

$\mathbf{f=\frac{1}{-1.5}}$

$\mathbf{f=\frac{10}{-15}}$

$\mathbf{f=-0.67m}$

Hope it helps ❣️❣️