allery୧୯୨୦ ଦଶକରେ କୋଲକାତାରେ ଏସ୍. କେ. ମିତ୍ରଙ୍କ ରେଡିଓ ପରୀକ୍ଷଣ ବାୟୁମଣ୍ଡଳର କେଉଁ ସ୍ତର ଉପରେ ଅନୁସନ୍ଧାନ କରିଥିଲା?
Aଟ୍ରୋପୋସ୍ଫିଅର୍
Bଆୟନୋସ୍ଫିଅର୍
Cଓଜୋନ୍ ସ୍ତର
Dମେସୋପଜ୍
Answer & Solution
Correct answer: B. ଆୟନୋସ୍ଫିଅର୍
ଏସ୍. କେ. ମିତ୍ର ଆୟନୋସ୍ଫିଅରର ସନ୍ଧାନ ପାଇଁ ଭୂ-ଭିତ୍ତିକ ରେଡିଓ ବ୍ୟବହାର କରିଥିଲେ, ଯାହା ଭାରତୀୟ ମହାକାଶ ଗବେଷଣାର ଏକ ପ୍ରାରମ୍ଭିକ ପଦକ୍ଷେପ ଥିଲା।
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