Define one diaopte of power of lens ?

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Solution

When the focal length of a lens is $1 m$ then the power of lens is called $1$ dioptre $.$

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Q. Define 1 dioptre power of a lens.

Q. Question 1
Define 1 dioptre of power of a lens.

What is meant by power of a lens? What is one dioptre?

Q. The power of a lens whose focal length is one metre is ______ dioptre.

Question 8
Which of the following statements is true?
(a) A convex lens has 4 dioptre power having a focal length 0.25 m.
(b) A convex lens has -4 dioptre power having a focal length -0.25 m.
(c) A concave lens has 4 dioptre power having a focal length 0.25 m.
(d) A concave lens has 4 dioptre power having a focal length -0.25 m.

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Define one diaopte of power of lens ?

When the focal length of a lens is 1m then the power of lens is called 1 dioptre.

When the focal length of a lens is $1 m$ then the power of lens is called $1$ dioptre $.$