Question

Why can a relay satellite can transmit the T.V. programme continuously at a location in the world?

• A. Period is greater than the period of rotation of the earth
• B. Period is less than the period of rotation of the earth about its axis
• C. Period has no relation with the period of the earth about its axis
• D. Period is equal to the period of rotation of the earth about its axis

Answer 1

The correct option is D Period is equal to the period of rotation of the earth about its axis

Telecommunication satellites are geostationary satellites. They have the advantage of remaining permanently in the same area of the sky, as viewed from a particular location on Earth and so permanently within view of a given ground station. Ground-based antennas do not need to track them but can remain fixed in one direction. Such satellites are often used for communication purposes as they have the ability to transmit the TV programmes continuously.