The line of sight distance for two antennas of height 100 m and 400 m above earth surface is approximtely. (Given $R = 6400 km, \sqrt{20}=4.5$)
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 108 km
To calculate the line of sight distance (d) between two antennaas -
$d=\sqrt{2h_1R}+\sqrt{2h_2R}$
Given,
$h_1=100m$
$h_2=400m$
$R=6.4×10^6m$
$∴d=\sqrt{2×100×6.4×10^6}+\sqrt{2×400×6.4×10^6}$
$≃108km$