Notes
लेसर का आविष्कार 1960 ई0 में हआ था।
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Hinglish Excerpt
Laser ka Avishkar 1960 eesvi mein hua tha.
Subjects: General KnowledgeCurrent AffairsTraditional General Knowledge
Exams: UPSCUPPCSSSCRRBIBPSSBIRBICTETAFCATUGC NETDefence/PoliceUPPCLCourt/LegalOthers