Exercises XIII — task. Science CBSE, Class 10.

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

Power of lens is,

\(P\ =\ 2f\)
\(P\ =\ \frac{2}{f}\)
\(P\ =\ f\)
\(P\ =\ \frac{1}{f}\)

Focal length of a lens (\(f\)) \(=\) \(m\)

Type of lens is,

Convex lens
Concave lens

Important!

Note: Enter your answers with one decimal digit.

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