A transmitting antenna at the top of a tower has a height 32 m and the height of the receiving antenna is 50 m. What is the maximum distance between them for satisfactory communication in LOS mode? Given radius of earth $6.4 × 10^6 m$.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 45.5 km
Using LOS distance between two points -
$d=\sqrt{2h_1R}+\sqrt{2h_1R}$
$=\sqrt{2×32×6.4×10^6}+\sqrt{2×50×6.4×10^6}$
$=45,548km$
$≃45.5km$