রেডিও ও টেলিভিশনের তরঙ্গ দৈর্ঘ্য কত?

A $>2.02\times 10^{4} mn$

B $>2.2\times 10^{5} mm$

C $>2.02\times 10^{5} nm$

D $>2.2\times 10^{5} nm$

Solution

Correct Answer: Option B

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