Define the SI unit of power of a lens.

1.	Define the SI unit of power of a lens.
Answer» The power of a lens is its ability to converge or diverge the rays of light falling on it. The power of a lens is equal to the reciprocal of the focal length of the lens.SI unit of power is dioptre (D). P = f₁ = 1D. The power of the lens is the ability of a lens to converge the rays falling on it. One dioptre is the power of the lens whose focal length is 1m.

Answer»

The power of a lens is its ability to converge or diverge the rays of light falling on it. The power of a lens is equal to the reciprocal of the focal length of the lens.SI unit of power is dioptre (D).

P = f₁ = 1D. The power of the lens is the ability of a lens to converge the rays falling on it. One dioptre is the power of the lens whose focal length is 1m.

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Define the SI unit of power of a lens.

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