यदि किसी ऐनक के लेन्स का पावर +2 डायोप्टर हो , तो इसके फोकस की दूरी होगी ? - If the power of a lens of a spectacle is +2 diopters, then its focal length will be? - Yadi Kisi Ainak Ke Lens Ka Power +2 Diopter Ho , To Iske Focus Ki Doori Hogi ? General Science in hindi, Physics 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
Withreference tostreet _lighting,how do sodium lamps differ from LED lamps
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