alleryएस.के.मित्राच्या 1920 च्या दशकांत कोलकाता हांगा केल्ल्या रेडिओ प्रयोगांत खंयच्या वातावरणीय प्रदेशाची चवकशी जाली?
Aक्षोभमंडलांत
Bआयनमंडल
Cओझोन थर
Dमेसोपॉज हें दुयेंस
Answer & Solution
Correct answer: B. आयनमंडल
एस.के.मित्रान आयनमंडलाचो आवाज करपाखातीर जमनीवयल्या रेडिओचो उपेग केलो, हें भारतीय अंतरिक्ष संशोधनांतलें सुरवेचें पावल.
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