अल्फा और बीटा किरणें की खो� – McqOptions

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1.	अल्फा और बीटा किरणें की खोज किसने की ?
A.	डाल्टन
B.	रॉन्टजन
C.	रदरफोर्ड
D.	विलाइर्ड
Answer» D. विलाइर्ड

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