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प्रश्न
What is the unit of power of a lens? Define the unit of power of a lens.
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उत्तर
The unit for the power of a lens is a dioptre (D). One dioptre is the power of a lens whose focal length is 1 metre.
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संबंधित प्रश्न
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| Column - I | Column - II | ||
| 1 | Retina | a | Path way of light |
| 2 | Pupil | b | Far point comes closer |
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| 4 | Myopia | d | Screen of the eye |
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