General Science- Lens ( Lens ) Ki Shamta Ka Matrak Hota Hai ?

Q.10589: लेन्स ( Lens ) की क्षमता का मात्रक होता है ?
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लेन्स ( Lens ) की क्षमता का मात्रक होता है ? - Lens is a measure of the capacity? - Lens ( Lens ) Ki Shamta Ka Matrak Hota Hai ? General Science in hindi,   Diopter question answers in hindi pdf  Lumen questions in hindi, Know About Opter General Science online test General Science notes in hindi quiz book    lux