Focal length of a lens; metre, then for power of a lens____________ (Fill in the blank)
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Answer:
1 Diopter
Explanation:
- power of Len is equal to 100÷f where f in cm
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Explanation:
Focal length of a lens; metre, then for power of a lens will be one dioptre.
A diopter is an optical power measurement unit of a lens or curved mirror that is equal to the reciprocal focal length measured in meters. It is, therefore, a reciprocal longitudinal unit. For instance, a 3-diopter lens provides 1⁄3 meter of parallel light rays to focus.
The measurement of the Dioptre, is with most values ranging from + 0.50 to + 3.50 and going up in 0.25 steps.
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