The SI unit of power of lens is _______.

metre

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centimetre

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dioptre

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watt

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Solution

The correct option is C dioptre

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Similar questions

Q. The SI unit of the power of a lens (P) is .

Q. What is meant by power of a lens? Write its SI unit. A student uses a lens of focal length

40

cm and another of

- 20

cm. Write the nature and power of the lens.

(a) What do you understand by the power of a lens? Name one factor on which the power of a lens depends.

(b) What is the unit of power of a lens? Define the unit of power of a lens.

(c) A combination of lenses for a camera contains two converging lenses of focal lengths 20 cm and 40 cm and a diverging lens of focal length 50 cm. Find the power and focal length of the combination.

Q. State the laws of refraction of light. Explain the term 'absolute refractive index of a medium' and write an expression to relate it with the speed of light in vaccum.
OR

What is meant by power of a lens ? Write its SI unit. A student uses a lens of focal length 40 cm and another of -20 cm. Write the power of each lens.

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The SI unit of power of lens is _______. ​

The correct option is C dioptre

The SI unit of power of lens is _______.