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28/12/2021 4:29 pm
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The height of the transmission and receiver tower are 380 m and 800 m respectively. If the radius of the earth is 6400 km, then find the range of LOS communication.
(a) 150 km
(b) 171 km
(c) 250 km
(d) 200 km
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28/12/2021 4:33 pm
Correct answer: (b) 171 km
Explanation:
Range = \(\sqrt{2Rh_1}\) + \(\sqrt{2Rh_2}\)
= \(\sqrt{2 \times 6400 \times 380}\) + \(\sqrt{2 \times 6400 \times 800}\) ≈ 171 km