14. Light । प्रकाश । Part: 1 । Science Foundation । ONE SHOT CLASS, SK Jha Sir #science #railwayexam

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14. Light । प्रकाश । Part: 2 । Science Foundation । ONE SHOT CLASS, SK Jha Sir #science #railwayexam

Complete Light (Prakash) Revision all finished in one video || Railway Science || Er. S K Jha Sir

14. Light । प्रकाश । Part: 3 । Science Foundation । ONE SHOT CLASS, SK Jha Sir #science #railwayexam

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