एक उत्तल लेन्स की फोकस दूरी 0.2 मीटर है । इसकी क्षमता होगी ? - The focal length of a convex lens is 0.2 m. Will it be capable? - Ek Uttal Lens Ki Focus Doori 0.2 Meeter Hai . Iski Shamta Hogi ? General Science in hindi, Physics - 2D question answers in hindi pdf - 4D questions in hindi, Know About +2D General Science online test General Science notes in hindi quiz book +5D