Notes
द्विफोकसी लेन्स का आविष्कार 1780 ई0 में हआ था।
द्विफोकसी लेन्स का आविष्कार 1780 ई0 में हआ था।
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Hinglish Excerpt
Dwiphokasi lens ka Avishkar 1780 eesvi mein hua tha.
Tags: 1780 ई०आविष्कारद्विफोकसी लेन्स
Subjects: General KnowledgeCurrent AffairsTraditional General Knowledge
Exams: UPSCUPPCSSSCRRBIBPSSBIRBICTETAFCATUGC NETDefence/PoliceUPPCLCourt/LegalOthers
