# The height of a transmitting antenna is 200 m. Radius of earth is 6.4 × 10^6 m 1. Which one of the following is used in TV transmission?

0 votes
357 views

closed

The height of a transmitting antenna is 200 m. Radius of earth is 6.4 × 106 m

1. Which one of the following is used in TV transmission?

• Sky wave
• Space wave
• Ground wave
• None of these

2. Find the range up to which the above antenna gives transmission signal.

3. Why is it necessary to use satellite for long distance transmission?

## 1 Answer

+1 vote
by (27.0k points)
selected

Best answer

1. Space wave

2. dm = $\sqrt{2Rh}$

d$\sqrt{2\times6.4\times10^6\times200}m$

3. Space waves can not be reflected back by iono sphere. Space wave can be reflected back to earth by making use of artificial satellite.

0 votes
1 answer
0 votes
1 answer
0 votes
1 answer
+1 vote
1 answer
0 votes
1 answer