What should be the height of transmittin

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Target Exam

CUET

Subject

Physics

Chapter

Electromagnetic Waves

Question:

What should be the height of transmitting antenna if the T.V. telecast is to cover a radius of 128 km?

Options:

1560 m

1280 m

1050 m

79 m

Correct Answer:

1280 m

Explanation:

Height of transmitting antenna

h = $\frac{d^2}{2 Re}=\frac{\left(128 \times 10^3\right)^2}{2 \times 6.4 \times 10^6}$ = 1280 m

Hence the correct answer will be (B)