# (Ii) the Power of a Lens is +2.0 D. Find Its Focal Length and State What Kind of Lens It Is. - Physics

Numerical
The power of a lens is +2.0 D. Find its focal length and state what kind of lens it is.

#### Solution

Focal length (in metres) = 1/"power(in dioptres)"

Focal length (in metres) = 1/2 = 0.5m = 50 cm

Since, the focal length is positive, the lens is aconvex lens.

Concept: Concept Refraction of Light Through a Lense
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#### APPEARS IN

Frank ICSE Class 10 Physics Part 2
Chapter 2 Light
Exercise 2.2 | Q 2.2 | Page 103