Question

Define SI unit of power of a lens. Write the relationship between the SI unit of

power of the lens and the SI unit of focal length.
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question is from Class 10.
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Physics ​

Answer 1

Answer:

It is defined as the reciprocal of focal length or it is the ability of a lens to bend the rays of light falling on it. ... Its SI unit is dioptre. Given v = 50 cm, since the size of image and that of the object is same, therefore, the image is formed at 2f.

Answer 2

AnswEr :

• SI unit of Power of Lens is Dioptre (D)

Relationship between Focal length and Power of lens is given by :

$\Large \leadsto{\boxed{\boxed{\sf{P\ =\ \dfrac{1}{F_{\footnotesize{(in\ meters)}}}}}}}$