Question

Find the focal length of a lens of power -2.0D. What type of lens is this???​

Answer 1

Answer:

f=50cm

and it is concave lens.

plz like

Answer 2

$\bigstar$$\boxed{\huge{\red{\mathfrak{Answer}}}}$$\bigstar$

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$\mathtt{P \longrightarrow \frac{1}{f}}$

$\mathtt{-2.0D \longrightarrow \frac{1}{f}}$

$\mathtt{f \longrightarrow -\frac{1}{2}}$

$\mathtt{Focal\:length \longrightarrow -0.5 m\:or\:-50\:cm}$

$\mathtt{The\:negative\:sign\:indicates\:that\:it\:is}$

$\mathtt{a\:concave\:mirror}$

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