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CBSE Class 10 Answered

explain dioptre of lens by optican
Asked by naushad_saeedi | 17 Sep, 2019, 10:52: PM
answered-by-expert Expert Answer
Diopter is the unit used to express the magnifying power of spherical lens.
 
Diopter is reciprocal of focal length when the focal length is expressed in metre.
 
Positive sign is used for the power of converging lens or convex lens.
 
Negative sign is used for the power of diverging lens or concave lens
Answered by Thiyagarajan K | 18 Sep, 2019, 11:54: AM

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