A geostationary satellite is a height h above the surface of earth. If radius of earth is R (θ is the colatitude), then

Q: A geostationary satellite is a height h above the surface of earth. If radius of earth is R (θ is the colatitude), then

Numerical

(a) the minimum colatitude on earth up to which the satellite can be used for communication is sin-1 (R/(R+h))

(b) the maximum colatitude on earth up to which the satellite can be used for communication is sin-1 (R/(R+h))

(c) the area on earth escaped from this satellite is given as 2πR2(1 + sin θ)

(d) the area on earth escaped from this satellite is given as 2π R2(1 + cos θ )

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Ans: (a) , (c)