" प्रकाश एक प्रकार की विद्युत चुम्बकीय तरंग है " - यह सर्वप्रथम किसने बताया ? - "Light is a kind of electromagnetic wave" - who first told this? - " Prakash Ek Prakar Ki Vidyut Chumabakiya Tarang Hai " - Yah Sarwapratham Kisne Bataya ? General Science in hindi, Physics Highanes question answers in hindi pdf germaldi questions in hindi, Know About Newton General Science online test General Science notes in hindi quiz book Maxwell
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