JEE Main 2012 Physics question
Not in JEE or NEET syllabus
A radar has a power of 1 Kw and is operating at a frequency of 10 GHz. It is located on a mountain top of height 500 m. The maximum distance upto which it can detect object located on the surface of the earth (Radius of earth m ) is
Answer: (1)
Solution
Line-of-sight range \sqrt{2Rh}\sqrt{2×6.4×10^6×500}$ =
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