General Science- Yadi Kisi Ainak Ke Lens Ka Power +2 Diopter Ho , To Iske Focus Ki Doori Hogi ?

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Q.10581: यदि किसी ऐनक के लेन्स का पावर +2 डायोप्टर हो , तो इसके फोकस की दूरी होगी ?
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यदि किसी ऐनक के लेन्स का पावर +2 डायोप्टर हो , तो इसके फोकस की दूरी होगी ? General Science in hindi,  100 CM question answers in hindi pdf  50 CM questions in hindi, Know About 200 CM General Science online test General Science notes in hindi quiz book    2 CM

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