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प्रश्न
State the power of a lens S.I. unit.
Give the SI unit of power of a lens.
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उत्तर
The SI unit of power is diopter (D).
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संबंधित प्रश्न
Find the focal length of a lens of power −2.0 D. What type of lens is this?
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Complete the diagram to show the formation of the image of the object AB.
(i) Name the Lens LL’.
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(iii) State three characteristics of the image.
Assertion and reasoning type
- Assertion: Myopia is due to the increase in the converging power of eye lens.
- Reason: Myopia can be corrected with the help of concave lens.
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An object is placed in front of a converging lens. Obtain the conditions under which the magnification produced by the lens is
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