Question

what is power of a lens??
what is is si unit??

plz answer​

Answer 1

Answer:

1. The power of a lens is defined as the reciprocal of the focal length. Lens power is measured in dioptres (D). Converging (convex ) lenses have positive focal lengths, so they also have positive power values.
2. si unit stands for international system.

hope this helps u ARMY..!!!^_^

Answer 2

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What is power of lens?

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1. The power of a lens is defined as the reciprocal of the focal length.
2. Length power is measured in dioptres (D).
3. If a lens has a shorter focal length it is said to be more powerful.

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What is SI unit?

1. SI unit stands for "Standard International Unit".
2. It precise that all the units of measurment,etc are represented in it's simplest or shortest form.

For Example:-

Meters/sec

Hope it helpes..

Thanks for asking..(∩_∩)