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Define I dioptre of power of a lens ?...

Define I dioptre of power of a lens ?

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The SI unit of power of a lens is expressed in dioptre (D). One dioptre is the power of the lens when the focal length of the lens is expressed in 1 metre.
1 dipotre `(D)=(1)/("metre (m)")=m^(-1)`
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Define 1 dioptre of power of a lens.

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  18. Draw ray diagrams showing the image formation by a convex lens when an...

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  19. Write laws of refraction. Explain the same with the help of ray diagra...

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  20. Draw ray diagram showing the image formation by a concave lens when an...

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  21. Draw ray diagrams showing the image formation by a convex mirror when ...

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