An antenna is mounted on a 400 m tall building. What will be the wavelength of signal that can be radiated effectively by the transmission tower upto a range of 44 km ?

Step-by-step solution

d = 2 R h T ⇒ 44 × 10 3 = 2 × 6400 × 10 3 × h T ⇒ h T = 151 . 25   m ∵ l antenna ≥ λ 4 ⇒ λ ≤ 4 l considering, h T = 1 = length of antenna λ = 4 × 151 . 25 = 605   m